Vocera Communications (VCRA) 10-K 17 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Mar. 10, 2014	Jun. 28, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'VOCERA COMMUNICATIONS, INC.	'	'
Entity Central Index Key	'0001129260	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Common Stock, Shares Outstanding	'	25,115,772	'
Entity Public Float	'	'	$245

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$39,652	$92,521
Short-term investments	88,024	34,989
Accounts receivable, net	23,543	21,697
Other receivables	882	550
Inventories	5,665	2,772
Prepaid expenses and other current assets	1,892	2,808
Total current assets	159,658	155,337
Property and equipment, net	5,365	3,631
Intangible assets, net	1,544	2,267
Goodwill	5,575	5,575
Other long-term assets	965	495
Total assets	173,107	167,305
Current liabilities	'	'
Accounts payable	3,531	2,854
Accrued payroll and other current liabilities	9,841	11,754
Deferred revenue, current	26,133	22,451
Total current liabilities	39,505	37,059
Deferred revenue, long-term	6,398	5,882
Other long-term liabilities	1,641	1,239
Total liabilities	47,544	44,180
Commitments and contingencies (Note 7)	'	'
Stockholders' equity	'	'
Preferred stock, $0.0003 par value - 5,000,000 shares authorized as of December 31, 2013 and December 31, 2012; zero shares issued and outstanding	0	0
Common stock, $0.0003 par value - 100,000,000 shares authorized as of December 31, 2013 and December 31, 2012; 24,967,140 and 24,229,356 shares issued and outstanding as of December 31, 2013 and December 31, 2012, respectively	7	7
Additional paid-in capital	189,966	177,081
Accumulated other comprehensive income	23	5
Accumulated deficit	-64,433	-53,968
Total stockholders’ equity	125,563	123,125
Total liabilities and stockholders’ equity	$173,107	$167,305

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Paranthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Liabilities, Convertible Preferred Stock and Stockholders' Deficit	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	24,967,140	24,229,356
Common stock, shares outstanding	24,967,140	24,229,356
Preferred Stock	'	'
Liabilities, Convertible Preferred Stock and Stockholders' Deficit	'	'
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue	'	'	'
Product	$62,393	$65,028	$50,322
Service	40,105	35,929	29,181
Total revenue	102,498	100,957	79,503
Cost of revenue	'	'	'
Product	21,714	21,551	17,465
Service	16,595	15,070	14,042
Total cost of revenue	38,309	36,621	31,507
Gross profit	64,189	64,336	47,996
Operating expenses	'	'	'
Research and development	14,915	11,618	9,335
Sales and marketing	44,928	33,432	28,151
General and administrative	14,906	14,390	11,316
Total operating expenses	74,749	59,440	48,802
(Loss) income from operations	-10,560	4,896	-806
Interest income	257	171	17
Interest expense	0	-84	-332
Other (expense) income, net	-53	-1,463	-1,073
(Loss) income before income taxes	-10,356	3,520	-2,194
Provision for income taxes	-109	-627	-285
Net (loss) income	-10,465	2,893	-2,479
Less: undistributed earnings attributable to participating securities	0	1,366	0
Net (loss) income attributable to common stockholders	($10,465)	$1,527	($2,479)
Net (loss) income per share attributable to common stockholders	'	'	'
Basic and diluted	($0.43)	$0.08	($0.74)
Weighted average shares used to compute net income (loss) per share attributable to common stockholders	'	'	'
Basic	24,621	17,979	3,370
Diluted	24,621	20,608	3,370

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net (loss) income	($10,465)	$2,893	($2,479)
Other comprehensive income, net:	'	'	'
Unrealized gain on investments, net of tax	18	5	0
Comprehensive (loss) income	($10,447)	$2,898	($2,479)

Consolidated_Statements_of_Pre

Consolidated Statements of Preferred Stock and Stockholders' Deficit (USD $)

Total

IPO [Member]

Follow-on public stock offering [Member]

Common stock

Common stock

Common stock

Additional paid-in capital

Additional paid-in capital

Additional paid-in capital

Accumulated other comprehensive gain

Accumulated deficit

Restricted stock units

Restricted stock units

Restricted stock units

Cashless Exercise [Member]

Cash Exercise [Member]

Cash Exercise [Member]

Cash Exercise [Member]

In Thousands, except Share data, unless otherwise specified

USD ($)

USD ($)

USD ($)

USD ($)

IPO [Member]

Follow-on public stock offering [Member]

USD ($)

IPO [Member]

Follow-on public stock offering [Member]

USD ($)

USD ($)

USD ($)

Common stock

Additional paid-in capital

Common stock

USD ($)

Common stock

Additional paid-in capital

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Balance at Dec. 31, 2010

($50,364)

'

'

$1

'

'

$4,017

'

'

$0

($54,382)

'

'

'

'

'

'

'

Balance (shares) at Dec. 31, 2010

'

'

'

2,777,094

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise of stock options (shares)

'

'

'

1,005,366

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise of stock options

1,224

'

'

0

'

'

1,224

'

'

'

'

'

'

'

'

'

'

'

Vesting of early exercised stock options

217

'

'

'

'

'

217

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Warrant Exercises

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-employee stock-based compensation expense

457

'

'

'

'

'

457

'

'

'

'

'

'

'

'

'

'

'

Employee stock-based compensation expense

1,001

'

'

'

'

'

1,001

'

'

'

'

'

'

'

'

'

'

'

ExperiaHealth performance awards

549

'

'

'

'

'

549

'

'

'

'

'

'

'

'

'

'

'

Repurchase of early exercised options (shares)

'

'

'

-1,970

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase of early exercised options

-4

'

'

'

'

'

-4

'

'

'

'

'

'

'

'

'

'

'

Net loss

-2,479

'

'

'

'

'

'

'

'

'

-2,479

'

'

'

'

'

'

'

Change in unrealized gain on available-for-sale securities

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance at Dec. 31, 2011

-49,399

'

'

1

'

'

7,461

'

'

0

-56,861

'

'

'

'

'

'

'

Balance (shares) at Dec. 31, 2011

'

'

'

3,780,490

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion of preferred stock into common stock (shares)

'

'

'

12,937,750

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion of preferred stock to common stock

53,356

'

'

4

'

'

53,352

'

'

'

'

'

'

'

'

'

'

'

Shares sold at public offering

'

'

'

'

5,000,000

1,337,500

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock in a public offering

'

70,535

35,975

'

2

0

'

70,533

35,975

'

'

'

'

'

'

'

'

'

Reclassification of preferred stock warrant liability into additional paid-in capital upon initial public offering

3,141

'

'

'

'

'

3,141

'

'

'

'

'

'

'

'

'

'

'

Exercise of stock options (shares)

'

'

'

1,073,732

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise of stock options

1,684

'

'

'

'

'

1,684

'

'

'

'

'

'

'

'

'

'

'

ESPP, Shares Purchased for Award

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Vesting of early exercised stock options

307

'

'

'

'

'

307

'

'

'

'

'

'

'

'

'

'

'

Exercise of common stock warrants

'

'

'

'

'

'

'

'

'

'

'

'

'

'

78,487

'

'

'

Proceeds from Warrant Exercises

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of restricted stock awards

'

'

'

24,152

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-employee stock-based compensation expense

29

'

'

'

'

'

29

'

'

'

'

'

'

'

'

'

'

'

Employee stock-based compensation expense

4,203

'

'

'

'

'

4,203

'

'

'

'

'

'

'

'

'

'

'

Income tax benefits from employee stock plans

406

'

'

'

'

'

406

'

'

'

'

'

'

'

'

'

'

'

Repurchase of early exercised options (shares)

'

'

'

-2,755

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase of early exercised options

-10

'

'

'

'

'

-10

'

'

'

'

'

'

'

'

'

'

'

Net loss

2,893

'

'

'

'

'

'

'

'

'

2,893

'

'

'

'

'

'

'

Change in unrealized gain on available-for-sale securities

5

'

'

'

'

'

'

'

'

5

'

'

'

'

'

'

'

'

Balance at Dec. 31, 2012

123,125

'

'

7

'

'

177,081

'

'

5

-53,968

'

'

'

'

'

'

'

Balance (shares) at Dec. 31, 2012

'

'

'

24,229,356

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise of stock options (shares)

420,492

'

'

420,492

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise of stock options

1,657

'

'

'

'

'

1,657

'

'

'

'

'

'

'

'

'

'

'

Vested, Number of Shares

'

'

'

'

'

'

'

'

'

'

'

117,245

71,824

'

'

'

'

'

RSUs released and tax settlement

'

'

'

'

'

'

'

'

'

'

'

-703

'

-703

'

'

'

'

ESPP, Shares Purchased for Award

215,039

'

'

215,039

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Value, Employee Stock Purchase Plan

2,993

'

'

'

'

'

2,993

'

'

'

'

'

'

'

'

'

'

'

Vesting of early exercised stock options

123

'

'

'

'

'

123

'

'

'

'

'

'

'

'

'

'

'

Exercise of common stock warrants

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

34,142

'

Proceeds from Warrant Exercises

226

'

'

'

'

'

'

'

'

'

'

'

'

'

'

226

'

226

Employee stock-based compensation expense

8,667

'

'

'

'

'

8,667

'

'

'

'

'

'

'

'

'

'

'

Income tax benefits from employee stock plans

-64

'

'

'

'

'

-64

'

'

'

'

'

'

'

'

'

'

'

Repurchase of early exercised options (shares)

'

'

'

-3,713

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchase of early exercised options

-14

'

'

'

'

'

-14

'

'

'

'

'

'

'

'

'

'

'

Net loss

-10,465

'

'

'

'

'

'

'

'

'

-10,465

'

'

'

'

'

'

'

Change in unrealized gain on available-for-sale securities

18

'

'

'

'

'

'

'

'

18

'

'

'

'

'

'

'

'

Balance at Dec. 31, 2013

$125,563

'

'

$7

'

'

$189,966

'

'

$23

($64,433)

'

'

'

'

'

'

'

Balance (shares) at Dec. 31, 2013

'

'

'

24,967,140

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities	'	'	'
Net (loss) income	($10,465,000)	$2,893,000	($2,479,000)
Depreciation, Depletion and Amortization	2,542,000	2,615,000	2,010,000
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'	'
Non-cash interest income	-71,000	-18,000	0
Loss on disposal of property and equipment	0	27,000	0
Bad debt expense (recovery)	16,000	0	-10,000
Inventory write-down	136,000	224,000	563,000
Change in lease-related performance liabilities	-207,000	-3,000	0
Share-based Compensation	8,667,000	4,232,000	1,458,000
Excess tax benefits from employee stock plans	0	-325,000	0
Change in fair value of warrant liability	0	1,631,000	981,000
Change in fair value of option liability	0	0	450,000
Changes in assets and liabilities	'	'	'
Accounts receivable	-1,861,000	-5,916,000	-6,670,000
Other receivables	-434,000	417,000	-74,000
Inventories	-3,029,000	367,000	-1,103,000
Prepaid expenses /OCA - DO NOT USE	446,000	-1,348,000	-263,000
Accounts payable	690,000	-1,145,000	2,969,000
Increase (Decrease) in Other Operating Liabilities	-1,887,000	2,803,000	1,379,000
Deferred revenue	4,198,000	5,840,000	6,301,000
Net cash (used in) provided by operating activities	-1,259,000	12,294,000	5,512,000
Cash flows from investing activities	'	'	'
Payment for purchase of property and equipment	-3,770,000	-2,565,000	-2,392,000
Purchase of short-term investments	-118,661,000	-104,869,000	0
Maturities of short-term investments	65,714,000	69,902,000	0
Changes in restricted cash	0	0	-62,000
Net cash used in investing activities	-56,717,000	-37,532,000	-2,454,000
Cash flows from financing activities	'	'	'
Cash from lease-related performance obligations	847,000	1,114,000	0
Proceeds from borrowings	0	0	4,500,000
Principal payment of borrowings	0	-8,333,000	-1,572,000
Proceeds from initial public offering, net of offering costs	0	72,070,000	0
Proceeds from secondary public offering, net of offering costs	0	35,975,000	0
Payment for repurchase of common stock	-14,000	-10,000	-4,000
Excess tax benefits from employee stock plans	0	325,000	0
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options	2,993,000	0	0
Proceeds from exercise of stock options	1,758,000	1,720,000	1,811,000
RSUs released and tax settlement	-703,000	0	0
Proceeds from Warrant Exercises	226,000	0	0
Proceeds from preferred stock warrants	0	0	2,000
Common stock issuance costs	0	0	-1,539,000
Net cash provided by financing activities	5,107,000	102,861,000	3,198,000
Net (decrease) increase in cash and cash equivalents	-52,869,000	77,623,000	6,256,000
Cash and cash equivalents at beginning of period	92,521,000	14,898,000	8,642,000
Cash and cash equivalents at end of period	39,652,000	92,521,000	14,898,000
Supplemental cash flow information	'	'	'
Cash paid for interest	0	91,000	314,000
Cash paid for income taxes	54,000	556,000	0
Supplemental disclosure of non-cash investing and financing activities	'	'	'
Costs related to the initial public offering in accounts payable and accrued liabilities	0	0	86,000
Property and equipment in accounts payable and accrued liabilities	$104,000	$321,000	$165,000

The_Company_and_Summary_of_Sig

The Company and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
The Company and Summary of Significant Accounting Policies	'
	The Company and Summary of Significant Accounting Policies
	Background
	Vocera Communications, Inc. (“the Company”) is a provider of secure, integrated, intelligent communication solutions, focused on empowering mobile workers in healthcare, hospitality, energy, and other mission-critical mobile work environments, in the U.S. and internationally. Today the majority of the Company's business is from healthcare, but the Company is expanding its sales and marketing efforts to enter and grow in other markets. Vocera helps its healthcare customers improve patient safety and satisfaction, and increase hospital efficiency and productivity through its Communication and Care Experience solutions. These have been installed in more than 1,200 healthcare and non-healthcare organizations worldwide.
	The Vocera Communication System, which includes an intelligent enterprise software platform, a lightweight, wearable, voice-controlled communication badge, and smartphone applications, enables users to connect instantly with other staff simply by saying the name, function or group name of the desired recipient. It also securely delivers text messages and alerts directly to and from smartphones, replacing legacy pagers.
	The Company was incorporated in Delaware on February 16, 2000. The Company formed wholly-owned subsidiaries Vocera Communications UK Ltd and Vocera Communications Australia Pty Ltd. in 2005, Vocera Hand-Off, Inc., Vocera Canada, Ltd. and ExperiaHealth, Inc. in 2010 and Vocera Communications India Private Ltd. in 2013. In August 2013, we merged Vocera Hand-Off Communications, Inc. and ExperiaHealth, Inc. into our parent company, Vocera Communications, Inc.
	Since its inception, the Company has incurred significant losses and, as of December 31, 2013, had an accumulated deficit of $64.4 million. The Company has funded its operations primarily with customer payments for its products and services, proceeds from the issuance of common stock in connection with its IPO and follow-on offering and, before the IPO, from the issuances of convertible preferred stock and from borrowings under its term loan facility and the utilization of its line of credit. As of December 31, 2013, the Company had cash, cash equivalents and short-term investments of $127.7 million, primarily as a result of its two public offerings in 2012 and subsequent net cash flows.
	The Company believes that its existing sources of liquidity will satisfy its working capital and capital requirements for at least the next twelve months. Failure to generate sufficient revenue, achieve planned gross margins, or control operating costs may require the Company to raise additional capital through equity or debt financing. Such additional financing may not be available on acceptable terms, or at all, and could require the Company to modify, delay or abandon some of its planned future expansion or expenditures or reduce some of its ongoing operating costs, which could harm its business, operating results, financial condition and ability to achieve its intended business objectives. If the Company raises additional funds through
	further issuances of equity, convertible debt securities or other securities convertible into equity, its existing stockholders could suffer significant dilution in their percentage ownership of the Company and any new securities it issues could have rights, preferences and privileges senior to those of holders of its common stock.
	Basis of presentation
	The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant inter-company transactions and balances have been eliminated in consolidation. The accompanying notes are prepared in accordance with accounting principles generally accepted in the United States (“GAAP”).
	The board of directors of the Company and its stockholders approved a 1-for-6 reverse stock split of the Company’s common and preferred shares that was effected on March 26, 2012. All share and per share information included in the accompanying consolidated financial statements have been adjusted to reflect this reverse stock split.
	Use of estimates
	The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting periods. The estimates include, but are not limited to, revenue recognition, warranty reserves, inventory reserves, stock-based compensation expense, provisions for income taxes and contingencies. Actual results could differ from these estimates, and such differences could be material to the Company’s financial position and results of operations.
	Cash, cash equivalents and short-term investments
	The Company’s cash equivalents and short-term investments consist of money market funds, commercial paper, U.S. government agency notes, U.S. Treasury notes, municipal debt and corporate debt. These investments are classified as available-for-sale securities and are carried at fair value with the unrealized gains and losses reported as a component of stockholders’ equity. Management determines the appropriate classification of its investments at the time of purchase and re-evaluates the available-for-sale designations as of each balance sheet date. Investments with an original purchase maturity of less than three months are classified as cash equivalents, all those with longer maturities are classified as short-term investments, which are available-for-sale.
	Restricted cash
	Restricted cash was $0.3 million at December 31, 2013 and 2012, respectively, the majority of which is security for a corporate travel card facility and credit card processing services. All restricted cash is classified as current, under prepaids and other current assets on the consolidated balance sheet, based on the underlying terms of the arrangements.
	Allowance for doubtful accounts
	The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the Company’s receivables portfolio determined on the basis of historical experience, specific allowances for known troubled accounts and other currently available evidence. The Company has not experienced significant credit losses from its accounts receivable. The Company performs a regular review of its customers’ payment histories and associated credit risks as it does not require collateral from its customers.
	The following table presents the changes in the allowance for doubtful accounts:
			Years ended December 31,
	(in thousands)		2013			2012		2011
	Allowance—beginning of period		$	—		$	—	$	(10	)
	Provisions for bad debts		(29		)	—		—
	Provisions charged to other accounts		—			—		—
	Recoveries from bad debts		13			—		10
	Write-offs and other		10			—		—
	Allowance—end of period		$	(6	)	$	—	$	—
	Inventories
	Inventories are valued at the lower of standard cost (which approximates actual cost on a first-in, first-out basis) or market (net realizable value or replacement cost). The Company assesses the valuation of inventory and periodically writes down the value for estimated excess and obsolete inventory based upon assumptions about future demand and market conditions.
	Concentration of credit risk and other risks and uncertainties
	Financial instruments that subject the Company to concentration of credit risk consist primarily of cash, cash equivalents and short-term investments. The Company’s cash and cash equivalents are primarily deposited with high quality financial institutions and in money market funds. Deposits at these institutions and funds may, at times, exceed federally insured limits. Management believes that these financial institutions and funds are financially sound and, accordingly, that minimal credit risk exists. The Company has not experienced any losses on its deposits of cash and cash equivalents. Marketable securities are stated at fair value, and accounted for as available-for-sale within short-term investments. The counterparties to the agreements relating to the Company’s investment securities consist of major corporations, financial institutions and government agencies of high credit standing.
	The primary hardware component of the Company’s products is currently manufactured by a third-party contractor in Mexico. A significant disruption in the operations of this contractor may impact the production of the Company’s products for a substantial period of time, which could harm the Company’s business, financial condition and results of operations.
	Concentration of credit risk with respect to trade accounts receivable is considered to be limited due to the diversity of the Company’s customer base and geographic sales areas. At December 31, 2013 and 2012, no customer accounted for 10% or more of accounts receivable. For the years ended December 31, 2013, 2012 and 2011, no customer represented 10% or more of revenue.
	Property and equipment
	Property and equipment are stated at cost and depreciated on a straight-line basis over the estimated useful economic lives of the assets. Assets generally have useful economic lives of three years except for leasehold improvements, which are amortized using the straight-line method over the shorter of the remaining lease term or the estimated useful life of the related assets. Purchased or developed software also generally has a three year useful economic life, except for major ERP implementations, for which the Company assumes a five year useful economic life. Upon retirement or sale, the cost and related accumulated depreciation and amortization are removed from the consolidated balance sheet and the resulting gain or loss is reflected in operations. Maintenance and repairs which are not considered improvements and do not extend the useful life of the assets are charged to operations as incurred.
	The Company periodically reviews property and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset is impaired or the estimated useful lives are no longer appropriate. Fair value is estimated based on discounted future cash flows. If indicators of impairment exist and the undiscounted projected cash flows associated with such assets are less than the carrying amount of the asset, an impairment loss is recorded to write the asset down to its estimated fair values. To date, the Company has not recorded any impairment charges.
	Software development costs.
	For internal-use software, the Company capitalizes certain internal and external costs incurred in its acquisition and creation. Capitalized internal-use software is included in property and equipment when development is complete and is amortized on a straight-line basis over the estimated useful life of the related asset, generally three years, except that five years is assumed for major ERP implementations. Per the authoritative guidance, costs incurred either before or after the period satisfying the capitalization criteria, together with costs incurred for training and maintenance, are expensed as incurred. For the years ended December 31, 2013, 2012 and 2011, the Company capitalized costs of $2.1 million, $1.1 million and $0.3 million, respectively.
	Goodwill and intangible assets
	The Company allocates the purchase price of any acquisitions to tangible assets and liabilities and identifiable intangible assets acquired. Any residual purchase price is recorded as goodwill. The allocation of the purchase price requires management to make significant estimates in determining the fair values of assets acquired and liabilities assumed, especially with respect to intangible assets. These estimates are based on information obtained from management of the acquired companies and historical experience. These estimates can include, but are not limited to, the cash flows that an asset is expected to generate in the future, and the cost savings expected to be derived from acquiring an asset. These estimates are inherently uncertain and unpredictable, and if different estimates were used the purchase price for the acquisition could be allocated to the acquired assets and liabilities differently from the allocation that the Company has made. In addition, unanticipated events and circumstances may occur which may affect the accuracy or validity of such estimates. If such events occur we may be required to record a charge against the value ascribed to an acquired asset or an increase in the amounts recorded for assumed liabilities.
	Goodwill
	Goodwill is tested for impairment at the reporting unit level at least annually or more often if events or changes in circumstances indicate the carrying value may not be recoverable. As of December 31, 2013, no changes in circumstances indicate that goodwill carrying values may not be recoverable. Application of the goodwill impairment test requires judgment. Circumstances that could affect the valuation of goodwill include, among other things, a significant change in the Company's business climate and the buying habits of the Company's customers along with changes in the costs to provide the Company's products and services. The Company has identified two operating segments (Product and Service) which management also considers to be reporting units. For the 2013 goodwill impairment test, the Company used the qualitative assessment permitted under recent accounting guidance, and concluded there was no goodwill impairment, without proceeding to Steps 1 and 2 of the quantitative approach.
	Intangible assets
	Intangible assets are amortized over their estimated useful lives. Upon completion of development, acquired in-process research and development assets are generally considered amortizable, finite-lived assets and are amortized over their estimated useful lives. Finite-lived intangible assets consist of customer relationships, developed technology, trademarks and non-compete agreements. The Company evaluates intangible assets for impairment by assessing the recoverability of these assets whenever adverse events or changes in circumstances or business climate indicate that expected undiscounted future cash flows related to such intangible assets may not be sufficient to support the net book value of such assets. An impairment is recognized in the period of identification to the extent the carrying amount of an asset exceeds the fair value of such asset. No impairment of intangible assets was recorded in 2013, 2012 or 2011.
	Significant judgments required in assessing the impairment of goodwill and intangible assets include the identification of reporting units, identifying whether events or changes in circumstances require an impairment assessment, estimating future cash flows, determining appropriate discount and revenue growth rates and other assumptions. Changes in these estimates and assumptions could materially affect the determination of fair value as to whether an impairment exists and, if so, the amount of that impairment.
	Convertible preferred stock
	Prior to the Company’s IPO, the Company had issued and outstanding six series of convertible preferred stock. As of December, 31, 2011, the proceeds recorded were $53.0 million with liquidation preference of $53.6 million. Each share of preferred stock was convertible, at the option of the holder, into common stock. Series A, Series C, Series D, Series E and Series F had a conversion ratio of 1:1. Series B preferred stock had a conversion ratio of 1:1.8304. In connection with the Company’s IPO, in April 2012, each share of then-outstanding preferred stock automatically converted into common stock at the ratio described above. In the statement of shareholders' equity for the year ended December 31, 2012, this was recorded as non-cash conversion of $53.4 million from preferred stock to common stock.
	Deferred Costs of Revenue
	When the Company’s products have been delivered, but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria, the Company also defers the related inventory costs for the delivered items. As of December 31, 2013 and 2012, respectively, the Company included $144,000 and $4,000 of such deferred cost of revenue as part of “Prepaid expenses and other current assets” in the accompanying consolidated balance sheet.
	Revenue recognition
	The Company derives revenue from the sales of communication badges, smartphones, perpetual software licenses for software that is essential to the functionality of the communication badges, software maintenance, extended product warranty and professional services. The Company also derives revenue from the sale of licenses for software that is not essential to the functionality of the communication badges. Sales tax is excluded from reported total revenue.
	Revenue is recognized when all of the below criteria are met:
	•	there is persuasive evidence that an arrangement exists, in the form of a written contract, amendments to that contract, or purchase orders from a third party;
	•	delivery has occurred or services have been rendered;
	•	the price is fixed or determinable after evaluating the risk of concession; and
	•	collectability is reasonably assured based on customer creditworthiness and past history of collection.
	A typical sales arrangement involves multiple elements, such as sales of communication badges, perpetual software licenses, professional services and maintenance services which entitle customers to unspecified upgrades, bug fixes, patch releases and telephone support. Revenue from the sale of communication badges and perpetual software licenses is recognized upon shipment or delivery at the customers’ premises as the contractual provisions governing sales of these products do not include any provisions regarding acceptance, performance or general right of return or cancellation or termination provisions adversely affecting revenue recognition. Revenue from the sale of maintenance services on software licenses is recognized over the period during which the services are provided, which is generally one year. Revenue from professional services is recognized either on a fixed fee basis based on milestones or on a time and materials basis as the services are provided, both of which generally take place over a period of two to twelve weeks.
	The Company also derives revenue from the provision of hosted services on a subscription basis and software sold under term licenses. Revenue from the sale of these products and services are not sold as part of multiple element arrangements and such arrangements are recognized ratably over the term of the arrangement.
	Revenue from sales-type leases
	A portion of the Company's sales are made through multi-year lease agreements with customers. When these arrangements are considered sales-type leases, upon delivery of leased products to customers, the Company recognizes revenue for such products in an amount equal to the net present value of the minimum lease payments. Unearned income is recognized as part of product revenue under the effective interest method. The Company recognizes revenue related to executory costs when such executory costs are incurred.
	Proceeds from transfers of sales-type leases to third-party financial companies are allocated between the net investment in sales-type leases and the executory cost component for remaining service obligations based on relative present value. The difference between the amount of proceeds allocated to the net investment in lease and the carrying value of the net investment in lease is included in product revenue. Proceeds allocated to the executory cost component are accounted for as financing liabilities.
	For the year ended December 31, 2013, the Company transferred $2.2 million of lease receivables, recording an immaterial net gain and $0.8 million of new financing liabilities for future performance of executory service obligations. For the year ended December 31, 2012, the Company transferred $3.8 million of lease receivables, recording an immaterial net gain and $1.1 million of new financing liabilities for future performance of executory service obligations.
For lease receivables retained as of December 31, 2013 and 2012, respectively, the Company recorded $1.4 million and $0.5 million of net investment in sales-type leases, equivalent to the minimum lease payments for the delivered product.
Commissions expense
Sales commissions are recorded as sales and marketing expense and accrued current liability as orders are recorded; thus no contract acquisition costs are capitalized.
Shipping and handling costs
Shipping and handling costs charged to customers are included in revenue and the associated expense is recorded in cost of products sold in the statements of operations for all periods presented.
Research and development expenditures
Research and development costs are charged to operations as incurred. Software development costs incurred prior to the establishment of technological feasibility are included in research and development and are expensed as incurred. After technological feasibility is established, material software development costs up to general availability of the software will be capitalized and amortized on a straight-line basis over the estimated product life, or based on the ratio of current revenues to total projected product revenues, whichever is greater. To date, the time between the establishment of technological feasibility and general availability has been very short and therefore no significant costs have been incurred. Accordingly, the Company has not capitalized any software development costs.
Advertising costs
Advertising costs are included in sales and marketing expense and are expensed as incurred. Advertising costs for the years ended December 31, 2013, 2012 and 2011 were immaterial.
Product warranties
The Company offers warranties on certain products and records a liability for the estimated future costs associated with warranty claims, which is based upon historical experience and the Company’s estimate of the level of future costs. The Company provides for the estimated costs of hardware warranties at the time the related revenue is recognized. Costs are estimated based on historical and projected product failure rates, historical and projected repair costs, and knowledge of specific product failures (if any). The specific hardware warranty includes parts and labor over a period generally ranging from one to three years. The Company provides no warranty for software. The Company regularly re-evaluates its estimates to assess the adequacy of the recorded warranty liabilities and adjust the amounts as necessary. Warranty costs are reflected in the consolidated statement of operations as cost of sales.
Stock-based compensation
For options granted to employees, stock-based compensation is measured at grant date based on the fair value of the award and is expensed on a straight-line basis over the requisite service period. The Company determines the grant date fair value of the options using the Black-Scholes option-pricing model. Restricted stock awards and restricted stock units, first awarded in 2012, result in compensation expense, straightlined over the requisite service period, based on the award date closing stock price. Equity instruments issued to non-employees are recorded at their fair value on the measurement date and are subject to periodic adjustment as the underlying equity instruments vest. The fair value of options granted to non-employees is amortized over the vesting period, on a straight-line basis.
For stock options issued to employees and non-employees with specific performance criteria, the Company makes a determination at each balance sheet date whether the performance criteria are probable of being achieved. Compensation expense is recognized until such time as the performance criteria are met or when it is probable that the criteria will not be met.
The Company will only recognize a tax benefit from stock-based awards in additional paid-in capital if an incremental tax benefit is realized after all other tax attributes currently available to the Company have been utilized. In addition, the Company has elected to account for the indirect effects of stock-based awards on other tax attributes, such as the research tax credit, through its statement of operations.
In 2012, the Company began incorporating restricted stock awards and RSUs as an element of our compensation plans. In 2012, the Company granted certain of its directors restricted stock which vests 50% on the first anniversary of the grant, and 50% on the second anniversary of the grant. In 2013, the Company began granting certain of its directors RSUs which vest 100% on the first anniversary of the grant. In 2012, the Company began granting certain employees RSUs, which vest one third on the first anniversary of the grant, one third on the second anniversary of the grant and one third upon the third anniversary of the grant.
Income taxes
The Company uses the asset and liability method of accounting for income taxes. Under this method, the Company records deferred income taxes based on temporary differences between the financial reporting and tax bases of assets and liabilities and use enacted tax rates and laws that the Company expects will be in effect when they recover those assets or settle those liabilities, as the case may be, to measure those taxes. In cases where the expiration date of tax carryforwards or the projected operating results indicate that realization is not likely, the Company provides for a valuation allowance. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized.
The Company has deferred tax assets, resulting from net operating losses, research and development credits and temporary differences that may reduce taxable income in future periods. A valuation allowance is required when it is more likely than not that all or a portion of a deferred tax asset will not be realized. In assessing the need for a valuation allowance, the Company estimates future taxable income, considering the feasibility of ongoing tax-planning strategies and the realizability of tax loss carryforwards. Valuation allowances related to deferred tax assets can be impacted by changes in tax laws, changes in statutory tax rates and future taxable income levels. If the Company were to determine that it would be able to realize its deferred tax assets in the future in excess of the net carrying amounts, it would decrease the recorded valuation allowance through an increase to income in the period in which that determination is made. Due to the history of losses the Company has generated in the past, the Company believes that it is not more likely than not that all of the deferred tax assets in the U.S. and Canada can be realized as of December 31, 2013 and 2012, respectively. Accordingly, the Company has recorded a full valuation allowance on its deferred tax assets for these years.
At December 31, 2013, the Company had a valuation allowance against net deferred tax assets of $21.0 million. The Company reviews on a quarterly basis its conclusions about the appropriate amount of its deferred income tax asset valuation allowance. In the ordinary course of business there is inherent uncertainty in quantifying the Company’s income tax positions. The Company assesses its income tax positions and records tax benefits for all years subject to examination based upon management’s evaluation of the facts, circumstances and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, the Company has recorded the highest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be realizable, no tax benefit has been recognized in the financial statements.
The Company includes interest and penalties with income taxes in the accompanying statement of operations. All of the Company’s net operating losses and research credit carryforwards prior to 2013 are subject to tax authority adjustment and all years after 2009 are still subject to tax authority examinations. The Company is currently not subject to any income tax audit examinations by tax authorities in any jurisdictions including U.S. federal, state and local or foreign countries.
Foreign currency translation
The functional currency of the Company’s foreign subsidiaries is the U.S. dollar.  Accordingly, monetary assets and liabilities in non-functional currency of these subsidiaries are remeasured using exchange rates in effect at the end of the period. Revenues and costs in local currency are remeasured using average exchange rates for the period, except for costs related to those consolidated balance sheet items that are remeasured using historical exchange rates. The resulting remeasurement gains and losses are included in the Company’s consolidated statements of operations. Translation gains and losses have not been significant to date.
Segments
Operating segments are components of an enterprise for which separate financial information is available and is evaluated regularly by the Company’s chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is the Chief Executive Officer. The Company has two operating segments which are both reportable business segments: (i) Product; and (ii) Service.
Comprehensive income (loss)
Before 2012, there were no components of comprehensive income which were excluded from net income (loss). For the years ended December 31, 2013 and 2012, the Company had small unrealized gains on available-for-sale securities. There were no other components within other comprehensive income for the years ended December 31, 2013 or 2012.
Related party transactions
During the years ended December 31, 2013 and 2012, the Company billed a related party, the University of Chicago Medical Center (“UCMC”), $0.5 million in each year for consulting services and technology solutions. One of the Company's board members, Sharon O’Keefe, is the President of UCMC. These transactions were recorded at arms-length prices. There were no material related party transactions for UCMC in the year ended 2011. During the year ended December 31, 2013 the Company billed a related party, the Hewlett-Packard Company, approximately $9,200 for software and support, at arms’ length prices. Through July of 2013, John N. McMullen, one of the Company’s directors, served as Treasurer & Senior Vice President at Hewlett-Packard. There were no material related party transactions for Hewlett-Packard in the years ended December 31, 2012 and 2011.
Recent accounting pronouncements
In July 2013, the FASB issued new guidance for the gross versus net presentation of unrecognized tax benefits. The FASB concluded that an unrecognized tax benefit should be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) or other tax credit carryforward when settlement in this manner is available under the tax law. The new guidance is effective for the Company's first quarter of 2014, applied prospectively. The Company has the option to apply the rule retrospectively and early adoption is permitted. Adoption of this standard is not expected to impact the financial position or results of operations of the Company.

Fair_value_of_financial_instru

Fair value of financial instruments	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair value of financial instruments	'
	Fair value of financial instruments
	The carrying values of the Company’s cash and cash equivalents and short-term investments approximate their fair value due to their short-term nature. As a basis for determining the fair value of its assets and liabilities, the Company established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: (Level 1) observable inputs such as quoted prices in active markets; (Level 2) inputs other than the quoted prices in active markets that are observable either directly or indirectly; and (Level 3) unobservable inputs in which there is little or no market data which requires the Company to develop its own assumptions. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. For the years ended December 31, 2013, 2012 and 2011 there have been no transfers between Level 1 and Level 2 fair value instruments and no transfers in or out of Level 3.
	The Company's money market funds are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices. The fair value of the Company's Level 2 fixed income securities are obtained from independent pricing services, which may use quoted market prices for identical or comparable instruments or model-driven valuations using observable market data or other inputs corroborated by observable market data.
	The table below summarizes the Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of December 31, 2013 and 2012, respectively. There were no liabilities measured at fair value on a recurring basis for these dates.
		31-Dec-13						31-Dec-12
	(in thousands)	Level 1		Level 2		Total		Level 1		Level 2		Total
	Assets
	Money market funds	$	22,991	$	—	$	22,991	$	45,040	$	—	$	45,040
	Commercial paper	—		900		900		—		32,487		32,487
	U.S. government and agency securities	—		11,279		11,279		—		10,001		10,001
	U.S. Treasury securities	—		5,235		5,235		—		—		—
	Municipal debt securities	—		4,765		4,765		—		—		—
	Corporate debt securities	—		67,055		67,055		—		—		—
	Total assets measured at fair value	$	22,991	$	89,234	$	112,225	$	45,040	$	42,488	$	87,528
	The financial accounts that are not subject to recurring fair value measurement include trade and other receivables, prepaid expenses and other current assets, total current liabilities and deferred revenues, both current and long-term. Due to their short maturities, the carrying amounts of these accounts approximate their fair values.

Cash_Cash_Equivalents_and_Shor

Cash, Cash Equivalents and Short-term Investments	12 Months Ended
	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]	'
Cash, Cash Equivalents, and Short-term Investments	'
	Cash, Cash Equivalents and Short-Term Investments
	The following tables display gross unrealized gains and gross unrealized losses for cash, cash equivalents and available-for-sale investments for the periods presented:
		As of December 31, 2013
	(in thousands)	Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			value
	Cash and cash equivalents:
	Demand deposits and other cash	$	15,451	$	—	$	—		$	15,451
	Money market funds	22,991		—		—			22,991
	Commercial paper	150		—		—			150
	Corporate debt securities	1,060		—		—			1,060
	Total cash and cash equivalents	39,652		—		—			39,652
	Short-Term Investments:
	Commercial paper	750		—		—			750
	U.S. government agency securities	11,275		5		(1		)	11,279
	U.S. Treasury securities	5,233		2		—			5,235
	Municipal debt securities	4,758		7		—			4,765
	Corporate debt securities	65,982		20		(7		)	65,995
	Total short-term investments	87,998		34		(8		)	88,024
	Total cash, cash equivalents and short-term investments	$	127,650	$	34	$	(8	)	$	127,676
		As of December 31, 2012
	(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair value
	Cash and cash equivalents:
	Demand deposits and other cash	$	39,982	$	—	$	—		$	39,982
	Money market funds	45,040		—		—			45,040
	Commercial paper	7,498		1		—			7,499
	Total cash and cash equivalents	92,520		1		—			92,521
	Short-Term Investments:
	Commercial paper	24,987		1		—			24,988
	U.S. government agency securities	9,998		3		—			10,001
	Total short-term investments	34,985		4		—			34,989
	Total cash, cash equivalents and short-term investments	$	127,505	$	5	$	—		$	127,510
	The Company has determined that the unrealized losses on its short-term investments as of December 31, 2013 do not constitute an "other than temporary impairment". There were no unrealized loss positions as of December 31, 2012. The unrealized losses for the short-term investments as of December 31, 2013 have all been in a continuous unrealized loss position for less than twelve months. The Company’s conclusion of no “other than temporary impairment” is based on the high credit quality of the securities, their short remaining maturity (less than five months, weighted average) and the Company’s intent and ability to hold such loss securities until maturity.
	Classification of the cash, cash equivalent and short-term investments by contractual maturity was as follows:
	(in thousands)	One year or shorter		Between 1 and 2 years		Total
	Balances as of December 31, 2013
	Cash and cash equivalents (1)	$	39,652	$	—	$	39,652
	Short-term investments	71,464		16,560		88,024
	Cash, cash equivalents and short-term investments	111,116		16,560		127,676
	Balances as of December 31, 2012
	Cash and cash equivalents (1)	$	92,521	$	—	$	92,521
	Short-term investments	34,989		—		34,989
	Cash, cash equivalents and short-term investments	$	127,510	$	—	$	127,510
	(1) Includes demand deposits and other cash, money market funds and other cash equivalent securities, all with 0-90 day maturity at purchase.
	All the above tables exclude restricted cash, primarily held in certificates of deposit, of $0.3 million as of December 31, 2013 and December 31, 2012 which is classified in prepaids and other current assets on the consolidated balance sheet.

Income_loss_per_share

Income (loss) per share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Income (loss) per share	'
	Income (loss) per share
	For fiscal years preceding 2013, basic and diluted net income (loss) per common share is presented in conformity with the two-class method required for participating securities. Immediately prior to the completion of the Company’s IPO on April 2, 2012, holders of Series A through Series F preferred stock were each entitled to receive non-cumulative dividends at the annual rate of 8% per share per annum, respectively, payable prior and in preference to any dividends on any shares of the Company’s common stock. In the event a dividend is paid on common stock, the holders of preferred stock were entitled to a proportionate share of any such dividend as if they were holders of common stock (on an as-if converted basis). The holders of the preferred stock did not have a contractual obligation to share in the losses of the Company. The Company considered its preferred stock to be participating securities. Additionally, the Company considers shares issued upon the early exercise of options subject to repurchase and unvested restricted shares to be participating securities as the holders of these shares have a nonforfeitable right to dividends. In accordance with the two-class method, earnings allocated to these participating securities and the related number of outstanding shares of the participating securities, which include contractual participation rights in undistributed earnings, have been excluded from the computation of basic and diluted net income (loss) per common share.
	Under the two-class method, net income (loss) attributable to common stockholders is determined by allocating undistributed earnings, calculated as net income less income attributable to participating securities between common stock and participating securities. In computing diluted net income (loss) attributable to common stockholders for calculation of diluted net income (loss) per share, undistributed earnings are re-allocated to reflect the potential impact of dilutive securities. Basic net income (loss) per common share is computed by dividing the net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the period. All participating securities are excluded from basic weighted-average common shares outstanding. Diluted net income per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders for calculation of diluted net income (loss) per share by the weighted-average number of common shares outstanding, including potential dilutive common shares assuming the dilutive effect of outstanding stock options using the treasury stock method.
	For fiscal year 2013, the two-class method is not applicable due to the net loss, which must be attributed entirely to the common shareholders. Additionally, as of December 31, 2013, there are only 26,463 of participating securities, consisting of repurchasable shares issued from early exercise of options and unvested restricted shares, so that the future effect of participating securities would generally be immaterial, even in years with net income.
	The following table presents the calculation of basic and diluted net income (loss) per share:
		Years ended December 31,
	(in thousands, except for share and per share amounts)	2013				2012			2011
	Numerator:
	Net (loss) income	$	(10,465	)		$	2,893		$	(2,479	)
	Less: undistributed earnings attributable to participating securities	—				(1,366		)	—
	Net (loss) income attributable to common stockholders	$	(10,465	)		$	1,527		$	(2,479	)
	Reallocation of undistributed earnings attributable to participating securities	—				32			—
	Net (loss) income attributable to common stockholders for diluted net (loss) income per share	$	(10,465	)		$	1,559		$	(2,479	)
	Denominator:
	Weighted-average shares used to compute basic net income (loss) per common share	24,621				17,979			3,370
	Effect of potentially dilutive securities:
	Employee stock options and restricted stock units	—				2,547			—
	Stock warrants	—				82			—
	Weighted average shares used to compute diluted income (loss) per common share	24,621				20,608			3,370
	Net (loss) income per share
	Net (loss) income per common share - basic and diluted	($0.43)				$0.08			($0.74)
	For the years ended 2013, 2012 and 2011, the following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:
		As of December 31,
	(in thousands)	2013			2012			2011
	Convertible preferred stock (on an as if converted basis)	—			—			12,916
	Options to purchase common stock	3,335			367			3,808
	Common stock subject to repurchase	25			—			169
	Warrants to purchase convertible preferred stock	—			—			213
	Warrants to purchase common stock	44			—			—
	Restricted stock units	623			25			—
	Restricted stock awards	12			—			—

Goodwill_and_intangible_assets

Goodwill and intangible assets	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and intangible assets	'
	Goodwill and intangible assets
	Goodwill
	The Company had $5.6 million of goodwill for each of the years as of December 31, 2013 and 2012. Goodwill is tested for impairment at the reporting unit level at least annually or more often if events or changes in circumstances indicate the carrying value may not be recoverable. The Company has two reporting units: Product and Service; as of December 31, 2013 all of the Company's goodwill resides in the Product reporting unit. The Company performed the annual required test of impairment of goodwill as of September 30, 2013.  For both 2013 and 2012, the Company used the qualitative assessment permitted under authoritative accounting guidance. Among the qualitative factors considered were changes since the prior impairment in the following: industry and competitive environment, business strategy, product mix, buyer and supplier bargaining power, potential market size, consistency in operating margins and cash flows, change in reporting unit / product life cycle stage and earnings quality and sustainability. The Company’s annual impairment test did not indicate impairment at any of its reporting units. No impairment was recorded in 2013, 2012 or 2011. As of December 31, 2013, no changes in circumstances indicate that goodwill carrying values may not be recoverable.
	Triggering event for impairment analysis
	During the three months ended June 30, 2013, the Company experienced a 37% one-day decrease in share price following an earnings announcement on May 2, 2013 of below-guidance results for the first quarter of 2013 and reduced forward guidance for fiscal year 2013, which was considered a triggering event for further inquiry for both goodwill and the acquired intangibles. A "Step Zero" impairment assessment for goodwill and intangible assets was performed as part of this analysis, with the conclusion of no impairment of goodwill or intangibles. As of the September 30, 2013 annual assessment date, there were no changes in circumstances indicating that the carrying values of goodwill or acquired intangibles may not be recoverable.
	Intangible assets
	The fair values for acquired intangible assets were determined by management relying in part on valuations performed by independent valuation specialists. Acquisition-related intangible assets are amortized over the life of the assets on an accelerated basis that approximates the expected economic benefit of the assets. This assumption results in amortization that is higher in earlier periods of the useful life. To date there has been no impairment of the Company's intangible assets. The estimated useful lives and carrying value of acquired intangible assets are as follows:
				December 31, 2013						December 31, 2012
	(in thousands)	Weighted average		Gross		Accumulated		Net		Gross		Accumulated		Net
		useful life		carrying		amortization		carrying		carrying		amortization		carrying
		(years)		amount				amount		amount				amount
	Intangible assets:
	Customer relationships	9		$	2,350	$	1,449	$	901	$	2,350	$	1,117	$	1,233
	Developed technology	6		$	1,880	$	1,264	$	616	$	1,880	$	896	$	984
	Trademarks	7		$	70	$	43	$	27	$	70	$	30	$	40
	Non-compete Agreements	2		70		70		—		70		60		10
	Total intangible assets, net			$	4,370	$	2,826	$	1,544	$	4,370	$	2,103	$	2,267
	Amortization of intangible assets was $0.7 million, $0.9 million and $1.0 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	Amortization of acquired intangible assets is reflected in the cost of revenues for developed technology and in operating expenses for the other intangibles. The estimated future amortization of acquired intangible assets as of December 31, 2013 was as follows:
	(in thousands)	Future amortization
	2014	567
	2015	389
	2016	258
	2017	156
	2018	106
	Thereafter	68
	Future amortization expense	$	1,544

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2013
Balance Sheet Components [Abstract]	'
Balance Sheet Components	'
	Consolidated balance sheet components
	Inventories
			December 31,
	(in thousands)		2013				2012
	Raw materials		$	806			$	23
	Finished goods		4,859				2,749
	Total inventories		$	5,665			$	2,772
	Property and equipment, net
			December 31,
	(in thousands)		2013				2012
	Computer equipment and software		$	7,345			$	4,127
	Furniture, fixtures and equipment		924				886
	Leasehold improvements		2,125				1,654
	Manufacturing tools and equipment		3,081				2,710
	Construction in process		555				1,100
	Property and equipment, at cost		14,030				10,477
	Less: Accumulated depreciation		(8,665		)		(6,846		)
	Property and equipment, net		$	5,365			$	3,631
	Depreciation and amortization expense for property and equipment for the years ended December 31, 2013, 2012 and 2011 was $1.8 million, $1.7 million, and $1.0 million, respectively.
	Net investment in sales-type leases
	The Company has sales-type leases with terms of 1.25 to 4 years. Sales-type lease receivables are collateralized by the underlying equipment. The components of our net investment in sales-type leases are as follows:
		December 31,
	(in thousands)	2013				2012
	Net minimum lease payments to be received	$	2,597			$	1,063
	Less: Unearned interest income and executory revenue portion	(1,167		)		(527		)
	Net investment in sales-type leases	1,430				536
	Less: Current portion	(620		)		(243		)
	Non-current net investment in sales-type leases	$	810			$	293
	There were no allowances for doubtful accounts on these leases as of December 31, 2013 and 2012. There is no guaranteed or unguaranteed residual value on the leased equipment. The current and non-current net investments in sales-types leases of $0.6 million and $0.8 million as of December 31, 2013 are reported as components of the consolidated balance sheet captions "other receivables" and "other long-tern assets", respectively.
	The minimum lease payments expected for future years under sales-type leases as of December 31, 2013 were as follows:
	(in thousands)	Future lease payments
	2014	$	929
	2015	806
	2016	633
	2017	229
	Total	$	2,597
	Accrued payroll and other current liabilities
			December 31,
	(in thousands)		2013				2012
	Payroll and related expenses		$	5,065			$	7,845
	Accrued payables		2,259				1,978
	Deferred rent, current portion		490				591
	Lease financing, current portion		528				212
	Product warranty		840				297
	Sales and use tax payable		259				397
	Other		400				434
	Total accrued payroll and other current liabilities		$	9,841			$	11,754
	The Company provides for the estimated costs of hardware warranties at the time the related revenue is recognized. Costs are estimated based on historical and projected product failure rates, historical and projected repair costs, and knowledge of specific product failures (if any). The specific hardware warranty includes parts and labor over a period generally ranging from one to three years. The Company provides no warranty for software. The Company regularly re-evaluates its estimates to assess the adequacy of the recorded warranty liabilities and adjust the amounts as necessary.
	A reconciliation of the changes in the Company’s warranty reserve for 2013, 2012 and 2011 is as follows:
			Years ended December 31,
	(in thousands)		2013				2012			2011
	Warranty balance at the beginning of the period		$	297			$	983		$	605
	Warranty expense accrued for shipments in period		1,185				540			1,563
	Changes in liability related to pre-existing warranties		536				(242		)	50
	Warranty settlements made		(1,178		)		(984		)	(1,235		)
	Warranty balance at the end of the period		$	840			$	297		$	983

Commitments

Commitments	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments	'
	Commitments and contingencies
	Non-cancelable purchase commitments
	The Company enters into non-cancelable purchase commitments with its third-party manufacturer whereby the Company is required to purchase any inventory held by the third-party manufacturer that have been purchased by them based on confirmed orders from the Company. As of December 31, 2013 and 2012, approximately $3.1 million and $4.1 million, respectively, of raw material inventory was purchased and held by the third-party manufacturer which was subject to such purchase requirements.
	Leases
	The Company leases office space for its headquarters and subsidiaries under non cancelable operating leases, which will expire between April 2014 and April 2017. The San Jose, California headquarters lease ends March 31, 2016, with a single three-year extension option at rates approximating then-fair market value. Total rent expense for the years ended December 31, 2013, 2012 and 2011 was $2.0 million, $1.9 million and $1.7 million, respectively. The Company recognizes rent expense on a straight-line basis over the lease period, and has accrued for rent expense incurred but not paid.
	Future minimum lease payments at December 31, 2013 under non-cancelable operating leases are as follows:
	(in thousands)	Operating
		leases
	2014	1,540
	2015	1,475
	2016	434
	2017	28
	Total minimum lease payments	$	3,477
	Indemnifications
	The Company undertakes, in the ordinary course of business, to (i) defend customers and other parties from certain third-party claims associated with allegations of trade secret misappropriation, infringement of copyright, patent or other intellectual property right, or tortious damage to persons or property and (ii) indemnify and hold harmless such parties from certain resulting damages, costs and other liabilities. The term of these undertakings may be perpetual and the maximum potential liability of the Company under certain of these undertakings is not determinable. Based on its historical experience, the Company believes the liability associated with these undertakings is minimal.
	The Company has entered into indemnification agreements with its directors and officers that may require the Company to indemnify its directors and officers against liabilities that may arise by reason of their status or service as directors or officers, other than liabilities arising from willful misconduct of the individual. The Company currently has directors and officers insurance. As there has been no significant history of losses, no expense accrual has been made.
	Securities Litigation
	On August 1, 2013, a purported securities class action entitled Michael Brado v. Vocera Communications Inc., et al. was filed in the United States District Court for the Northern District of California, against the Company and certain of its officers, its board of directors, a former director and the underwriters for the Company's initial public offering. A second purported securities class action, entitled Duncan v. Vocera Communications Inc., et al., was filed on August 21, 2013, also in the Northern District of California, against the same parties. On September 27, 2013, the Court ordered the matters related. The suits purport to allege claims under Sections 11, 12(a)(2) and 15 of the Securities Act of 1933 and Section 10(b) and 20(a) of the Exchange Act of 1934 for allegedly misleading statements in the registration statement for the Company's initial public offering and in subsequent communications regarding its business and financial results. The suits are purportedly brought on behalf of purchasers of the Company's securities between March 28, 2012 and May 3, 2013, and seek compensatory damages, rescission, fees and costs, as well as equitable and injunctive or other relief. The plaintiffs’ motion for consolidation of the actions and for appointment of lead plaintiff has been granted, and the Company anticipates that the plaintiffs will file an amended consolidated complaint. No response to the current complaints is due at this time.
	Due to the inherent uncertainties of litigation, the Company cannot accurately predict the ultimate outcome of this matter. The Company is unable at this time to determine whether the outcome of the litigation would have a material impact on its results of operations, financial condition or cash flow. The Company has not established any reserve for any potential liability relating to this lawsuit, because this contingency is not considered probable and reasonably estimable.
	From time to time, we may be involved in other lawsuits, claims, investigations and proceedings, consisting of intellectual property, commercial, employment and other matters which arise in the ordinary course of business.

Common_stock

Common stock	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Common Stock	'
	Common Stock and Share-based Compensation
	The Company’s certificate of incorporation, as amended, authorizes the Company to issue 100 million shares of $0.0003 par value common stock.
	At December 31, 2013, the Company has reserved shares for issuance of common stock as follows:
		Common Shares
	Reserved under stock option plans	328,519
	Exercise of warrants to purchase common stock	44,491
	Total reserved for issuance	373,010
	Incentive stock option plans
	The Company has three equity incentive plans: the 2000 Stock Option Plan (the “2000 Plan”), the 2006 Stock Option Plan (the “2006 Plan”) and the 2012 Stock Option Plan (the “2012 Plan”). On March 26, 2012, all shares that were reserved under the 2006 Plan but not subject to outstanding awards became available for grant under the 2012 Plan. No additional shares will be issued under the 2006 Plan. The 2000 Plan terminated in March 2010 and no additional shares will be issued under this plan. All options currently outstanding under the 2000 Plan and the 2006 Plan continue to be governed by the terms and conditions of those plans. Under the 2012 Plan, the Company has the ability to issue incentive stock options (“ISOs”), stock appreciation rights, restricted stock, restricted stock units (“RSUs”), performance awards and stock bonuses. The ISOs will be granted at a price per share not less than the fair value at date of grant. Options granted to new hires generally vest over a 4-year period with 25% vesting at the end of one year and the remaining vest monthly thereafter, options granted as merit awards generally vest monthly over a four-year period. Options granted generally are exercisable up to 10 years. As of December 31, 2013, there were 328,519 shares remaining available for future issuance under the 2012 Plan.
	Early exercise of stock options
	The Company typically allows employees to exercise options granted under the 2000 and 2006 Plans prior to vesting. The unvested shares are subject to the Company’s repurchase right at the original purchase price. The proceeds initially are recorded as an accrued liability from the early exercise of stock options and reclassified to common stock as the Company’s repurchase right lapses. At December 31, 2013, 2012 and 2011, there were unvested shares in the amount of 14,360, 48,260 and 112,967, respectively, which were subject to repurchase at an aggregate price of $0.1 million, $0.2 million and $0.4 million, respectively.
	Stock Option Activity
	The following table summarizes the combined stock option activity under the 2000 Plan, the 2006 Plan and the 2012 Plan and non-plan stock option agreements:
			Options outstanding
			Number			Weighted			Weighted		Aggregate
			of options			average			average		intrinsic
						exercise			remaining		value
						price			contractual term
									(in years)		(in thousands)
	Outstanding at December 31, 2012		3,187,559			$	7.51		6.81		$	56,362
	Options granted		675,460			16.85
	Options exercised		(420,492	)		3.94
	Options canceled		(142,102	)		12.17
	Options expired		(13,221	)		22.47
	Outstanding at December 31, 2013		3,287,204			$	9.62		6.45		$	24,880
	Options vested and expected to vest as of December 31, 2013		3,238,937			$	9.51		6.41		$	24,824
	Options vested and exercisable as of December 31, 2013		1,996,061			$	5.82		5.05		$	21,169
	At December 31, 2013, there was $8.2 million of unrecognized net compensation cost related to options which is expected to be recognized over a weighted-average period of 2.5 years The Company did not grant non-employee options in either of the years ended December 31, 2013 or 2012.
	Using the Black-Scholes option-pricing model, the weighted-average grant-date fair value of options granted to employees during the years ended December 31, 2013, 2012 and 2011 was $7.34 per share, $10.19 per share, and $3.30 per share, respectively. Further information regarding the value of employee options vested and exercised during the years ended December 31, 2013, 2012 and 2011 is set forth below.
			Years ended December 31,
	(in thousands)		2013				2012			2011
	Grant-date fair value of options vested during period		$	3,053			$	2,256		$	881
	Intrinsic value of options exercised during period		5,896				24,846			2,565
	The Company uses the Black-Scholes option-pricing model to calculate the fair value of stock options on their grant date. This model requires the following major inputs: the estimated fair value of the underlying common stock, the expected term of the option, the expected volatility of the underlying common stock over the expected life of the option, the risk-free interest rate and expected dividend yield. The following assumptions were used for each respective period for employee stock-based compensation:
			Years ended December 31,
			2013		2012		2011
	Expected Term (in years)		5.38 - 5.43		5.23 - 5.60		5.49 - 5.73
	Volatility		46.7% - 48.1%		47.9% - 48.7%		44.7% - 47.6%
	Risk-free interest rate		0.81% - 1.80%		0.72% - 1.03%		0.98% - 2.48%
	Dividend yield		0.00%		0.00%		0.00%
	The computation of expected term is based on the historical exercise and forfeiture behavior of the Company’s employees, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior. For the expected term so determined, the risk-free rate is the U.S. Treasury Rate for that term on the grant date. The Company's expected common stock price volatility is based on the historical volatility of a peer group of publicly-traded companies, using the same expected term. The peer group was selected based on industry and market capitalization data. The Company assumes the dividend yield to be zero, as the Company has never declared or paid dividends and does not expect to do so in the foreseeable future.
	Employee Stock Purchase Plan
	In March 2012, the Company's board of directors and stockholders approved the 2012 Employee Stock Purchase Plan (the “ESPP”). The ESPP allows eligible employees to purchase shares of the Company's common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations. The ESPP provides for six-month offering periods, except for the first offering period which was for 11 months. Additionally, in April 2013, the Company's compensation committee determined that following the February 15, 2013 six-month offering period, the next offering period under the ESPP would last for three months (commencing August 15, 2013 and expiring on November 14, 2013) and, following the expiration of such offering period, offering periods thereafter will commence on November 15, 2013, and May 15, 2014 and so on, each consisting of a single six-month purchase period.
	At the end of each offering period, employees are able to purchase shares at 85% of the lower of the fair market value of the Company's common stock on the first trading day of the offering period or on the last day of the offering period. During the year ended December 31, 2013, employees purchased 215,039 shares of common stock at an average purchase price of $13.92. No shares were purchased under the plan in 2012. As of December 31, 2013, 193,920 shares remained available for future issuance under the ESPP.
	The Company uses the Black-Scholes option-pricing model to calculate the fair value of periodic ESPP offerings on their offer date. The following assumptions were used for each respective period for the ESPP:
			Years ended December 31,
			2013		2012
	Expected Term (in years)		0.25 - 0.50		0.50 - 0.88
	Volatility		33.3% - 36.0%		43.2% - 50.0%
	Risk-free interest rate		0.05% - 0.13%		0.14% - 0.18%
	Dividend yield		0.00%		0.00%
	Restricted Stock Awards and Restricted Stock Units
	In 2012, the Company began incorporating restricted stock awards and RSUs as an element of its compensation plans. In February 2012, the Company granted certain of its directors restricted stock awards that vest 50% on the first anniversary of the grant, and 50% on the second anniversary of the grant. In May 2012, the Company granted certain employees RSUs, which vest one third on the first anniversary of the grant, one third on the second anniversary of the grant and one third upon the third anniversary of the grant.
	A summary of the restricted stock activity for the year ended December 31, 2013 is presented below:
			Restricted Stock Awards						Restricted Stock Units
			Number of shares			Weighted Average Grant Date Fair Value per Share			Number of shares			Weighted Average Grant Date Fair Value per Share
	Outstanding at December 31, 2012		24,152			$	12.42		373,908			$	25.34
	Granted		—			—			558,686			16.91
	Vested		(12,076	)		12.42			(117,245	)		25.18
	Forfeited		—			—			(60,078	)		23.63
	Outstanding at December 31, 2013		12,076			$	12.42		755,271			$	19.24
	At December 31, 2013, there was $16,000 of unrecognized net compensation cost related to restricted stock awards which is expected to be recognized over a weighted-average period of 0.1 years. At December 31, 2013, there was $10.8 million of unrecognized net compensation cost related to RSUs, which is expected to be recognized over a weighted-average period of 2.1 years.
	Non-Employee Stock-Based Compensation
While the Company granted no options to non-employees during the years ended December 31, 2013 and 2012, the Company granted 67,916 options to non-employees during the year ended December 31, 2011. All options granted to non-employees during 2011 were fully vested on the date of grant. Stock-based compensation expense related to stock options granted to non-employees is recognized as the stock option vests, or if fully vested, on the date of grant.
For stock options issued to non-employees with specific performance criteria, the Company makes a determination at each balance sheet date whether the performance criteria are probable of being achieved. Compensation expense is recognized at the time it is determined that it is probable the performance criteria will be met. For the November 2010 ExperiaHealth acquisition, the entire $0.1 million consideration to the seller was in the form of revenue milestone performance options, with 41,666 options for 2010 revenue performance and another 41,666 options for 2011. Of the first tranche, 35,452 options ultimately vested, and the 2011 performance options for 41,666 shares vested entirely in March 2012. Under accounting guidance for acquisitions, such contingent consideration is recorded initially as a liability, and adjusted to fair value at each reporting date through net income, until vested. The 2012 pricing model assumptions below refer not to new non-employee grants in 2012, but to revaluation of the 2011 performance options. During the first quarter of 2012, the fair value of these increased from $419,000 to $448,000, resulting in 2012 stock-based compensation expense of $29,000. The entirely liability was then reclassified back to December 31, 2011 as equity.
The fair value of the stock options granted to non-employees was calculated using the Black-Scholes option-pricing model with the following assumptions:
		As of December 31,
			2012		2011
Expected Term (in years)			8.67		8.83 - 10.0
Volatility			46.70%		45.0% - 54.0%
Risk-free interest rate			1.77%		1.63% - 3.41%
Dividend yield			0.00%		0.00%
For the years ended December 31, 2013, 2012 and 2011, the Company recognized expenses of approximately zero, $29,000 and $907,000, respectively, related to these options.
Allocation of Stock-Based Compensation Expense
Stock-based compensation expense is recognized based on a straight-line amortization method over the respective vesting period of the award and has been reduced for estimated forfeitures. The Company estimated the expected forfeiture rate based on its historical experience, considering voluntary termination behaviors, trends of actual award forfeitures, and other events that will impact the forfeiture rate. To the extent the Company’s actual forfeiture rate is different from the estimate, the stock-based compensation expense is adjusted accordingly.
The following table presents the stock-based compensation allocation of expense (both for employees and non-employees):
		Years ended December 31,
(in thousands)		2013				2012			2011
Cost of revenue		$	967			$	421		$	30
Research and development		861				449			121
Sales and marketing		2,942				1,262			285
General and administrative		3,897				2,100			1,022
Total stock-based compensation		$	8,667			$	4,232		$	1,458
Exercise of common stock warrants
Prior to the April 2012 IPO, outstanding warrants to purchase preferred stock were classified as liabilities, which were adjusted to fair value at each reporting period until the earlier of their exercise or expiration or the completion of a liquidation event, including the completion of an initial public offering, at which time the preferred stock warrant liability automatically converted into a warrant to purchase shares of common stock and was reclassified to stockholders’ equity (deficit). The Company recorded an expense in other income (expense), net of zero, $1.6 million and $1.0 million for the years ended December 31, 2013, 2012 and 2011, respectively, to reflect the change in the fair value of the outstanding preferred stock warrants. Since April 2012, the converted common stock warrants are classified within stockholder's equity (deficit) because they are considered to be "indexed to the entity's own stock".
The holders of all the common stock warrants described above may undertake a cashless conversion of the warrant, in whole or in part, in lieu of exercising the warrant. The number of shares to be issued in such a conversion shall be determined by dividing (a) the aggregate fair market value of the shares issuable upon the exercise of the warrant minus the aggregate warrant price of such shares by (b) the fair market value of one share at the time of conversion.
During the year ended December 31, 2013, holders of common stock warrants exercised 34,142 shares for cash proceeds of $0.2 million. There were no cash exercises in the prior twelve-month period. During the year ended December 31, 2012, holders of common stock warrants net exercised warrants for the purchase of 108,155 shares and received 78,487 shares. There were no such cashless exercises in the current twelve month period.
At December 31, 2013 warrants to purchase 44,491 shares of common stock, each with exercise price of $6.61, were outstanding and expire in October 2015.

Segments

Segments	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segments	'
	Segments
	The Company has two operating segments which are both reportable segments: (i) Product; and (ii) Service, which are comprised of the Company’s and its wholly-owned subsidiaries’ results from operations. Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker (CODM), or decision making group, in deciding how to allocate resources and in assessing performance. The Company’s CODM is its Chief Executive Officer.
	The CODM regularly receives information related to revenue, cost of revenue, and gross profit for each operating segment, and uses this information to assess performance and make resource allocation decisions. All other financial information, including operating expenses and assets, is prepared and reviewed by the CODM on a consolidated basis.
	Assets are not a measure used to assess the performance of the Company by the CODM, therefore the Company does not report assets by segment internally or in its financial statements.
	The following table presents a summary of the operating segments:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Revenue
	Product	$	62,393		$	65,028		$	50,322
	Service	40,105			35,929			29,181
	Total revenue	102,498			100,957			79,503
	Cost of revenue
	Product	21,714			21,551			17,465
	Service	16,595			15,070			14,042
	Total cost of revenue	38,309			36,621			31,507
	Gross profit
	Product	40,679			43,477			32,857
	Service	23,510			20,859			15,139
	Total gross profit	64,189			64,336			47,996
	Operating expenses	74,749			59,440			48,802
	Interest income (expense), net and other	204			(1,376		)	(1,388		)
	(Loss) income before income taxes	$	(10,356	)	$	3,520		$	(2,194	)
	The following tables present the Company’s revenue by product line, as well as revenue and long-lived assets by geographic region.
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Revenue
	Product
	Device	$	46,636		$	47,725		$	37,088
	Software	15,757			17,303			13,234
	Total product	62,393			65,028			50,322
	Service
	Maintenance and support	31,559			26,237			21,439
	Professional services and training	8,546			9,692			7,742
	Total service	40,105			35,929			29,181
	Total revenue	$	102,498		$	100,957		$	79,503
	The Company’s revenue by geographic region, based on customer location, is summarized as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Revenue
	United States	$	91,763		$	90,108		$	73,719
	International	10,735			10,849			5,784
	Total revenue	$	102,498		$	100,957		$	79,503
	The Company’s tangible long-lived assets by geographic region, consisting of net property and equipment, are summarized as follows:
		December 31,
	(in thousands)	2013			2012			2011
	Property and equipment, net
	United States	$	5,249		$	3,465		$	2,646
	International	116			166			55
	Total property and equipment, net	$	5,365		$	3,631		$	2,701
	At December 31, 2013 and 2012, no customer accounted for 10% or more of accounts receivable. For the years ended December 31, 2013, 2012 and 2011, no customer represented 10% or more of revenue.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income taxes
	The components of (loss) income before income taxes are as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	United States	$	(10,812	)	$	3,205		$	(2,421	)
	International	456			315			227
	Total (loss) income before income taxes	$	(10,356	)	$	3,520		$	(2,194	)
	The components of the provision for income taxes are as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Current
	Federal	$	—		$	7		$	25
	State	(40		)	512			156
	Foreign	74			38			55
		34			557			236
	Deferred
	Federal	60			60			60
	State	4			10			9
	Foreign	11			—			(20		)
		75			70			49
	Total income tax provision	$	109		$	627		$	285
	The Company had an effective tax rate of (1.1)%, 17.8% and (13.0)% for the years ended December 31, 2013, 2012 and 2011, respectively.
	Reconciliation of the provision for income taxes at the statutory rate to the Company’s provision for income tax is as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	U.S. federal (tax benefit) provision at statutory rate	$	(3,567	)	$	1,197		$	(746	)
	State (tax benefit) income taxes, net of federal benefit	(338		)	151			109
	Foreign income taxes at rates other than the US rate	(28		)	(10		)	(72		)
	Stock-based compensation	549			397			340
	Change in valuation allowance	3,911			(1,494		)	546
	Non-deductible warrant expense	—			625			334
	Research and development credits	(527		)	(220		)	(290		)
	Other	109			(19		)	64
	Total	$	109		$	627		$	285
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented:
		As of December 31,
	(in thousands)	2013			2012
	Deferred tax assets
	Net operating loss carryforward	$	11,873		$	14,270
	Research and development credits	2,809			2,637
	Depreciation and amortization	288			84
	Reserves and accruals	6,060			4,502
	Total deferred tax assets	21,030			21,493
	Valuation allowance	(21,030		)	(21,193		)
	Net deferred tax assets	—			300
	Deferred tax liabilities	(216		)	(451		)
	Net deferred tax liabilities	$	(216	)	$	(151	)
	The Company determines its valuation allowance on deferred tax assets by considering both positive and negative evidence in order to ascertain whether it is more likely than not that deferred tax assets will be realized. Realization of deferred tax assets is dependent upon the generation of future taxable income, if any, the timing and amount of which are uncertain. Due to the history of losses the Company has generated in the past, the Company believes that it is not more likely than not that all of the deferred tax assets in the U.S. and Canada can be realized as of December 31, 2013; accordingly, the Company has recorded a full valuation allowance on its deferred tax assets.
	The Company’s valuation allowance decreased by $0.2 million and $1.5 million for the years ended December 31, 2013 and 2012, respectively. The changes in the valuation allowances were primarily due to the addition of loss carryforwards.
	At December 31, 2013, the Company had $49.6 million and $37.5 million, respectively, of federal and state net operating loss carryforwards. Included in the gross amount, approximately $27.2 million of net operating loss is created by excess stock option deduction. A credit to APIC will be recorded when the excess stock option deduction reduces the income tax payable.
	The federal net operating loss carryforward begins expiring in 2015, and the state net operating loss carryforward began expiring in 2014, if not utilized.
	In addition, the Company has federal research and development tax credits carryforwards of approximately $1.7 million and state research and development tax credit carryforwards of approximately $2.5 million. The federal credit carryforwards begin expiring 2021 and the state credits carry forward indefinitely. The Internal Revenue Code (IRC) contains provisions which limit the amount of net operating loss (NOL) and research credit carryforwards that can be used in any given year if a significant change in ownership has occurred. During the year, the Company determined that prior changes in ownership as defined under IRC Section 382 had occurred, resulting in a reduction in the Company's NOL and credits carryovers for amounts which will expire unutilized due to these limitations. Accordingly, the Company decreased its deferred tax asset and corresponding valuation allowance by $2.5 million to reflect the reduction of these carryovers. As of December 31, 2013, $12.8 million of the Company's NOL carryovers and $0.5 million of credit carryovers are subject to an annual $0.6 million limitation, of which $7.5 million NOLs would be available to offset future taxable income in the twenty-year carryforward period.
	The following table displays by contributing factor the changes in the valuation allowance for deferred tax assets since January 1, 2011:
		Years Ended December 31,
	(in thousands)	2013			2012			2011
	Balance at the beginning of the period	$	21,193		$	22,687		$	21,588
	Net operating loss utilization	(2,397		)	(3,505		)	(884		)
	R&D tax credit (decrease) increase	172			272			383
	Depreciation and amortization increase (decrease)	204			29			(309		)
	Reserves and accruals increase	1,558			1,273			1,581
	Deferred tax assets decrease	300			437			328
	Balance at the end of the period	$	21,030		$	21,193		$	22,687
	The Company adopted the authoritative guidance for "Accounting for Uncertainty of Income Taxes" on January 1, 2009. The following table reflects changes in the unrecognized tax benefits since January 1, 2012:
	Years ended December 31,
(in thousands)	2013			2012
Gross amount of unrecognized tax benefits as of the beginning of the period	$	1,079		$	908
Increases related to prior year tax provisions	30			7
Decreases related to prior year tax provisions	(239		)	—
Increases related to current year tax provisions	222			164
Gross amount of unrecognized tax benefits as of the end of the period	$	1,092		$	1,079
As a result of the Company’s historic losses and related valuation allowances, the Company has recorded the uncertain tax amounts above entirely as reductions to deferred tax assets which are subject to a full valuation allowance in its consolidated balance sheet. The Company recognizes interest and penalties relating to uncertain tax positions in income tax expense. For the years ended December 31, 2013 and 2012, penalties and interest were $26,000 and zero, respectively. As the Company is not currently under examination, it is reasonable to assume that the balance of gross unrecognized tax benefits will likely not change in the next twelve months.
The Company files income tax returns in the United States on a federal basis and in various states. The Company is not currently under any international or any United States federal, state and local income tax examinations for any taxable years. All of the Company’s net operating losses and research credit carryforwards prior to 2013 are subject to tax authority adjustment and all years after 2008 are still subject to the tax authority examinations.
The Company has not provided for U.S. federal and foreign withholding taxes on $0.9 million of the Company’s non-U.S. subsidiaries’ undistributed earnings as of December 31, 2013, since the Company intends to reinvest this amount outside the U.S. indefinitely. The tax impact of repatriating these earnings is not practical to compute.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent events	'
	Subsequent events
	Business Acquisition
	On January 13, 2014, the Company acquired certain assets of mVisum, Inc., an innovative provider of alarm management technology solutions for health systems, for $3.5 million cash in an asset purchase transaction. This new acquisition specifically addresses communications breakdowns caused by alarm fatigue, which has become a top patient safety concern and a regulatory priority.
	Alarm fatigue occurs when clinicians receive too many alarms during a given shift with too little context or data to assess the urgency or criticality of the alarms, which can negatively affect patient safety. The mVisum technology platform provides images and data, including waveforms like electrocardiograms, with the alarm notification directly to the physician, nurse or other members of the care team so that they can prioritize their response based on context and important information.
	The acquisition is expected to align well with the Company's strategic vision of being the leader in integrated, intelligent communications solutions for healthcare and other mission-critical environments.
	The Company is currently completing the preliminary purchase price allocation and expects the majority of the purchase consideration will be allocable to intangibles and goodwill.

The_Company_and_Summary_of_Sig1

The Company and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of presentation
	The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant inter-company transactions and balances have been eliminated in consolidation. The accompanying notes are prepared in accordance with accounting principles generally accepted in the United States (“GAAP”).
	The board of directors of the Company and its stockholders approved a 1-for-6 reverse stock split of the Company’s common and preferred shares that was effected on March 26, 2012. All share and per share information included in the accompanying consolidated financial statements have been adjusted to reflect this reverse stock split.
Consolidation	'
	The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant inter-company transactions and balances have been eliminated in consolidation.
Use of Estimates	'
	Use of estimates
	The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting periods. The estimates include, but are not limited to, revenue recognition, warranty reserves, inventory reserves, stock-based compensation expense, provisions for income taxes and contingencies. Actual results could differ from these estimates, and such differences could be material to the Company’s financial position and results of operations.
Cash, Cash Equivalents and Short-term Investments	'
	Cash, cash equivalents and short-term investments
	The Company’s cash equivalents and short-term investments consist of money market funds, commercial paper, U.S. government agency notes, U.S. Treasury notes, municipal debt and corporate debt. These investments are classified as available-for-sale securities and are carried at fair value with the unrealized gains and losses reported as a component of stockholders’ equity. Management determines the appropriate classification of its investments at the time of purchase and re-evaluates the available-for-sale designations as of each balance sheet date. Investments with an original purchase maturity of less than three months are classified as cash equivalents, all those with longer maturities are classified as short-term investments, which are available-for-sale.
Restricted Cash	'
	Restricted cash
	Restricted cash was $0.3 million at December 31, 2013 and 2012, respectively, the majority of which is security for a corporate travel card facility and credit card processing services. All restricted cash is classified as current, under prepaids and other current assets on the consolidated balance sheet, based on the underlying terms of the arrangements.
Allowance for Doubtful Accounts	'
	Allowance for doubtful accounts
	The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the Company’s receivables portfolio determined on the basis of historical experience, specific allowances for known troubled accounts and other currently available evidence. The Company has not experienced significant credit losses from its accounts receivable. The Company performs a regular review of its customers’ payment histories and associated credit risks as it does not require collateral from its customers.
	The following table presents the changes in the allowance for doubtful accounts:
			Years ended December 31,
	(in thousands)		2013			2012			2011
	Allowance—beginning of period		$	—		$	—		$	(10	)
	Provisions for bad debts		(29		)	—			—
	Provisions charged to other accounts		—			—			—
	Recoveries from bad debts		13			—			10
	Write-offs and other		10			—			—
	Allowance—end of period		$	(6	)	$	—		$	—
Inventories	'
	Inventories
	Inventories are valued at the lower of standard cost (which approximates actual cost on a first-in, first-out basis) or market (net realizable value or replacement cost). The Company assesses the valuation of inventory and periodically writes down the value for estimated excess and obsolete inventory based upon assumptions about future demand and market conditions.
Concentration of credit risk and other risks and uncertainties	'
	Concentration of credit risk and other risks and uncertainties
	Financial instruments that subject the Company to concentration of credit risk consist primarily of cash, cash equivalents and short-term investments. The Company’s cash and cash equivalents are primarily deposited with high quality financial institutions and in money market funds. Deposits at these institutions and funds may, at times, exceed federally insured limits. Management believes that these financial institutions and funds are financially sound and, accordingly, that minimal credit risk exists. The Company has not experienced any losses on its deposits of cash and cash equivalents. Marketable securities are stated at fair value, and accounted for as available-for-sale within short-term investments. The counterparties to the agreements relating to the Company’s investment securities consist of major corporations, financial institutions and government agencies of high credit standing.
	The primary hardware component of the Company’s products is currently manufactured by a third-party contractor in Mexico. A significant disruption in the operations of this contractor may impact the production of the Company’s products for a substantial period of time, which could harm the Company’s business, financial condition and results of operations.
	Concentration of credit risk with respect to trade accounts receivable is considered to be limited due to the diversity of the Company’s customer base and geographic sales areas. At December 31, 2013 and 2012, no customer accounted for 10% or more of accounts receivable. For the years ended December 31, 2013, 2012 and 2011, no customer represented 10% or more of revenue.
Property and Equipment	'
	Property and equipment
	Property and equipment are stated at cost and depreciated on a straight-line basis over the estimated useful economic lives of the assets. Assets generally have useful economic lives of three years except for leasehold improvements, which are amortized using the straight-line method over the shorter of the remaining lease term or the estimated useful life of the related assets. Purchased or developed software also generally has a three year useful economic life, except for major ERP implementations, for which the Company assumes a five year useful economic life. Upon retirement or sale, the cost and related accumulated depreciation and amortization are removed from the consolidated balance sheet and the resulting gain or loss is reflected in operations. Maintenance and repairs which are not considered improvements and do not extend the useful life of the assets are charged to operations as incurred.
	The Company periodically reviews property and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset is impaired or the estimated useful lives are no longer appropriate. Fair value is estimated based on discounted future cash flows. If indicators of impairment exist and the undiscounted projected cash flows associated with such assets are less than the carrying amount of the asset, an impairment loss is recorded to write the asset down to its estimated fair values. To date, the Company has not recorded any impairment charges.
Software Development Costs	'
	Software development costs.
	For internal-use software, the Company capitalizes certain internal and external costs incurred in its acquisition and creation. Capitalized internal-use software is included in property and equipment when development is complete and is amortized on a straight-line basis over the estimated useful life of the related asset, generally three years, except that five years is assumed for major ERP implementations. Per the authoritative guidance, costs incurred either before or after the period satisfying the capitalization criteria, together with costs incurred for training and maintenance, are expensed as incurred. For the years ended December 31, 2013, 2012 and 2011, the Company capitalized costs of $2.1 million, $1.1 million and $0.3 million, respectively.
Goodwill and Intangible Assets	'
	Goodwill and intangible assets
	The Company allocates the purchase price of any acquisitions to tangible assets and liabilities and identifiable intangible assets acquired. Any residual purchase price is recorded as goodwill. The allocation of the purchase price requires management to make significant estimates in determining the fair values of assets acquired and liabilities assumed, especially with respect to intangible assets. These estimates are based on information obtained from management of the acquired companies and historical experience. These estimates can include, but are not limited to, the cash flows that an asset is expected to generate in the future, and the cost savings expected to be derived from acquiring an asset. These estimates are inherently uncertain and unpredictable, and if different estimates were used the purchase price for the acquisition could be allocated to the acquired assets and liabilities differently from the allocation that the Company has made. In addition, unanticipated events and circumstances may occur which may affect the accuracy or validity of such estimates. If such events occur we may be required to record a charge against the value ascribed to an acquired asset or an increase in the amounts recorded for assumed liabilities.
	Goodwill
	Goodwill is tested for impairment at the reporting unit level at least annually or more often if events or changes in circumstances indicate the carrying value may not be recoverable. As of December 31, 2013, no changes in circumstances indicate that goodwill carrying values may not be recoverable. Application of the goodwill impairment test requires judgment. Circumstances that could affect the valuation of goodwill include, among other things, a significant change in the Company's business climate and the buying habits of the Company's customers along with changes in the costs to provide the Company's products and services. The Company has identified two operating segments (Product and Service) which management also considers to be reporting units. For the 2013 goodwill impairment test, the Company used the qualitative assessment permitted under recent accounting guidance, and concluded there was no goodwill impairment, without proceeding to Steps 1 and 2 of the quantitative approach.
	Intangible assets
	Intangible assets are amortized over their estimated useful lives. Upon completion of development, acquired in-process research and development assets are generally considered amortizable, finite-lived assets and are amortized over their estimated useful lives. Finite-lived intangible assets consist of customer relationships, developed technology, trademarks and non-compete agreements. The Company evaluates intangible assets for impairment by assessing the recoverability of these assets whenever adverse events or changes in circumstances or business climate indicate that expected undiscounted future cash flows related to such intangible assets may not be sufficient to support the net book value of such assets. An impairment is recognized in the period of identification to the extent the carrying amount of an asset exceeds the fair value of such asset. No impairment of intangible assets was recorded in 2013, 2012 or 2011.
	Significant judgments required in assessing the impairment of goodwill and intangible assets include the identification of reporting units, identifying whether events or changes in circumstances require an impairment assessment, estimating future cash flows, determining appropriate discount and revenue growth rates and other assumptions. Changes in these estimates and assumptions could materially affect the determination of fair value as to whether an impairment exists and, if so, the amount of that impairme
Stockholders' Equity, Policy	'
	Convertible preferred stock
	Prior to the Company’s IPO, the Company had issued and outstanding six series of convertible preferred stock. As of December, 31, 2011, the proceeds recorded were $53.0 million with liquidation preference of $53.6 million. Each share of preferred stock was convertible, at the option of the holder, into common stock. Series A, Series C, Series D, Series E and Series F had a conversion ratio of 1:1. Series B preferred stock had a conversion ratio of 1:1.8304. In connection with the Company’s IPO, in April 2012, each share of then-outstanding preferred stock automatically converted into common stock at the ratio described above. In the statement of shareholders' equity for the year ended December 31, 2012, this was recorded as non-cash conversion of $53.4 million from preferred stock to common stock.
Deferred Charges, Policy	'
	Deferred Costs of Revenue
	When the Company’s products have been delivered, but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria, the Company also defers the related inventory costs for the delivered items. As of December 31, 2013 and 2012, respectively, the Company included $144,000 and $4,000 of such deferred cost of revenue as part of “Prepaid expenses and other current assets” in the accompanying consolidated balance sheet.
Revenue Recognition, Policy	'
	Revenue recognition
	The Company derives revenue from the sales of communication badges, smartphones, perpetual software licenses for software that is essential to the functionality of the communication badges, software maintenance, extended product warranty and professional services. The Company also derives revenue from the sale of licenses for software that is not essential to the functionality of the communication badges. Sales tax is excluded from reported total revenue.
	Revenue is recognized when all of the below criteria are met:
	•	there is persuasive evidence that an arrangement exists, in the form of a written contract, amendments to that contract, or purchase orders from a third party;
	•	delivery has occurred or services have been rendered;
	•	the price is fixed or determinable after evaluating the risk of concession; and
	•	collectability is reasonably assured based on customer creditworthiness and past history of collection.
	A typical sales arrangement involves multiple elements, such as sales of communication badges, perpetual software licenses, professional services and maintenance services which entitle customers to unspecified upgrades, bug fixes, patch releases and telephone support. Revenue from the sale of communication badges and perpetual software licenses is recognized upon shipment or delivery at the customers’ premises as the contractual provisions governing sales of these products do not include any provisions regarding acceptance, performance or general right of return or cancellation or termination provisions adversely affecting revenue recognition. Revenue from the sale of maintenance services on software licenses is recognized over the period during which the services are provided, which is generally one year. Revenue from professional services is recognized either on a fixed fee basis based on milestones or on a time and materials basis as the services are provided, both of which generally take place over a period of two to twelve weeks.
	The Company also derives revenue from the provision of hosted services on a subscription basis and software sold under term licenses. Revenue from the sale of these products and services are not sold as part of multiple element arrangements and such arrangements are recognized ratably over the term of the arrangement.
	Revenue from sales-type leases
	A portion of the Company's sales are made through multi-year lease agreements with customers. When these arrangements are considered sales-type leases, upon delivery of leased products to customers, the Company recognizes revenue for such products in an amount equal to the net present value of the minimum lease payments. Unearned income is recognized as part of product revenue under the effective interest method. The Company recognizes revenue related to executory costs when such executory costs are incurred.
	Proceeds from transfers of sales-type leases to third-party financial companies are allocated between the net investment in sales-type leases and the executory cost component for remaining service obligations based on relative present value. The difference between the amount of proceeds allocated to the net investment in lease and the carrying value of the net investment in lease is included in product revenue. Proceeds allocated to the executory cost component are accounted for as financing liabilities.
	For the year ended December 31, 2013, the Company transferred $2.2 million of lease receivables, recording an immaterial net gain and $0.8 million of new financing liabilities for future performance of executory service obligations. For the year ended December 31, 2012, the Company transferred $3.8 million of lease receivables, recording an immaterial net gain and $1.1 million of new financing liabilities for future performance of executory service obligations.
	For lease receivables retained as of December 31, 2013 and 2012, respectively, the Company recorded $1.4 million and $0.5 million of net investment in sales-type leases, equivalent to the minimum lease payments for the delivered product.
Revenue Recognition, sales type leases	'
	Revenue from sales-type leases
	A portion of the Company's sales are made through multi-year lease agreements with customers. When these arrangements are considered sales-type leases, upon delivery of leased products to customers, the Company recognizes revenue for such products in an amount equal to the net present value of the minimum lease payments. Unearned income is recognized as part of product revenue under the effective interest method. The Company recognizes revenue related to executory costs when such executory costs are incurred.
	Proceeds from transfers of sales-type leases to third-party financial companies are allocated between the net investment in sales-type leases and the executory cost component for remaining service obligations based on relative present value. The difference between the amount of proceeds allocated to the net investment in lease and the carrying value of the net investment in lease is included in product revenue. Proceeds allocated to the executory cost component are accounted for as financing liabilities.
	For the year ended December 31, 2013, the Company transferred $2.2 million of lease receivables, recording an immaterial net gain and $0.8 million of new financing liabilities for future performance of executory service obligations. For the year ended December 31, 2012, the Company transferred $3.8 million of lease receivables, recording an immaterial net gain and $1.1 million of new financing liabilities for future performance of executory service obligations.
	For lease receivables retained as of December 31, 2013 and 2012, respectively, the Company recorded $1.4 million and $0.5 million of net investment in sales-type leases, equivalent to the minimum lease payments for the delivered product.
Commissions Expense, Policy	'
	Commissions expense
	Sales commissions are recorded as sales and marketing expense and accrued current liability as orders are recorded; thus no contract acquisition costs are capitalized.
Shipping and Handling Costs	'
	Shipping and handling costs
	Shipping and handling costs charged to customers are included in revenue and the associated expense is recorded in cost of products sold in the statements of operations for all periods presented.
Research and Development Expenditures	'
	Research and development expenditures
	Research and development costs are charged to operations as incurred. Software development costs incurred prior to the establishment of technological feasibility are included in research and development and are expensed as incurred. After technological feasibility is established, material software development costs up to general availability of the software will be capitalized and amortized on a straight-line basis over the estimated product life, or based on the ratio of current revenues to total projected product revenues, whichever is greater. To date, the time between the establishment of technological feasibility and general availability has been very short and therefore no significant costs have been incurred. Accordingly, the Company has not capitalized any software development costs.
Advertising Costs	'
	Advertising costs
	Advertising costs are included in sales and marketing expense and are expensed as incurred. Advertising costs for the years ended December 31, 2013, 2012 and 2011 were immaterial.
Product Warranties	'
	Product warranties
	The Company offers warranties on certain products and records a liability for the estimated future costs associated with warranty claims, which is based upon historical experience and the Company’s estimate of the level of future costs. The Company provides for the estimated costs of hardware warranties at the time the related revenue is recognized. Costs are estimated based on historical and projected product failure rates, historical and projected repair costs, and knowledge of specific product failures (if any). The specific hardware warranty includes parts and labor over a period generally ranging from one to three years. The Company provides no warranty for software. The Company regularly re-evaluates its estimates to assess the adequacy of the recorded warranty liabilities and adjust the amounts as necessary. Warranty costs are reflected in the consolidated statement of operations as cost of sales.
Product Warranties	'
	The Company provides for the estimated costs of hardware warranties at the time the related revenue is recognized. Costs are estimated based on historical and projected product failure rates, historical and projected repair costs, and knowledge of specific product failures (if any). The specific hardware warranty includes parts and labor over a period generally ranging from one to three years. The Company provides no warranty for software. The Company regularly re-evaluates its estimates to assess the adequacy of the recorded warranty liabilities and adjust the amounts as necessary.
	A reconciliation of the changes in the Company’s warranty reserve for 2013, 2012 and 2011 is as follows:
			Years ended December 31,
	(in thousands)		2013			2012			2011
	Warranty balance at the beginning of the period		$	297		$	983		$	605
	Warranty expense accrued for shipments in period		1,185			540			1,563
	Changes in liability related to pre-existing warranties		536			(242		)	50
	Warranty settlements made		(1,178		)	(984		)	(1,235		)
	Warranty balance at the end of the period		$	840		$	297		$	983
Stock-based Compensation	'
	Stock-based compensation
	For options granted to employees, stock-based compensation is measured at grant date based on the fair value of the award and is expensed on a straight-line basis over the requisite service period. The Company determines the grant date fair value of the options using the Black-Scholes option-pricing model. Restricted stock awards and restricted stock units, first awarded in 2012, result in compensation expense, straightlined over the requisite service period, based on the award date closing stock price. Equity instruments issued to non-employees are recorded at their fair value on the measurement date and are subject to periodic adjustment as the underlying equity instruments vest. The fair value of options granted to non-employees is amortized over the vesting period, on a straight-line basis.
	For stock options issued to employees and non-employees with specific performance criteria, the Company makes a determination at each balance sheet date whether the performance criteria are probable of being achieved. Compensation expense is recognized until such time as the performance criteria are met or when it is probable that the criteria will not be met.
	The Company will only recognize a tax benefit from stock-based awards in additional paid-in capital if an incremental tax benefit is realized after all other tax attributes currently available to the Company have been utilized. In addition, the Company has elected to account for the indirect effects of stock-based awards on other tax attributes, such as the research tax credit, through its statement of operations.
	In 2012, the Company began incorporating restricted stock awards and RSUs as an element of our compensation plans. In 2012, the Company granted certain of its directors restricted stock which vests 50% on the first anniversary of the grant, and 50% on the second anniversary of the grant. In 2013, the Company began granting certain of its directors RSUs which vest 100% on the first anniversary of the grant. In 2012, the Company began granting certain employees RSUs, which vest one third on the first anniversary of the grant, one third on the second anniversary of the grant and one third upon the third anniversary of the grant.
Income Taxes	'
	Income taxes
	The Company uses the asset and liability method of accounting for income taxes. Under this method, the Company records deferred income taxes based on temporary differences between the financial reporting and tax bases of assets and liabilities and use enacted tax rates and laws that the Company expects will be in effect when they recover those assets or settle those liabilities, as the case may be, to measure those taxes. In cases where the expiration date of tax carryforwards or the projected operating results indicate that realization is not likely, the Company provides for a valuation allowance. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized.
	The Company has deferred tax assets, resulting from net operating losses, research and development credits and temporary differences that may reduce taxable income in future periods. A valuation allowance is required when it is more likely than not that all or a portion of a deferred tax asset will not be realized. In assessing the need for a valuation allowance, the Company estimates future taxable income, considering the feasibility of ongoing tax-planning strategies and the realizability of tax loss carryforwards. Valuation allowances related to deferred tax assets can be impacted by changes in tax laws, changes in statutory tax rates and future taxable income levels. If the Company were to determine that it would be able to realize its deferred tax assets in the future in excess of the net carrying amounts, it would decrease the recorded valuation allowance through an increase to income in the period in which that determination is made. Due to the history of losses the Company has generated in the past, the Company believes that it is not more likely than not that all of the deferred tax assets in the U.S. and Canada can be realized as of December 31, 2013 and 2012, respectively. Accordingly, the Company has recorded a full valuation allowance on its deferred tax assets for these years.
	At December 31, 2013, the Company had a valuation allowance against net deferred tax assets of $21.0 million. The Company reviews on a quarterly basis its conclusions about the appropriate amount of its deferred income tax asset valuation allowance. In the ordinary course of business there is inherent uncertainty in quantifying the Company’s income tax positions. The Company assesses its income tax positions and records tax benefits for all years subject to examination based upon management’s evaluation of the facts, circumstances and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, the Company has recorded the highest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be realizable, no tax benefit has been recognized in the financial statements.
	The Company includes interest and penalties with income taxes in the accompanying statement of operations. All of the Company’s net operating losses and research credit carryforwards prior to 2013 are subject to tax authority adjustment and all years after 2009 are still subject to tax authority examinations. The Company is currently not subject to any income tax audit examinations by tax authorities in any jurisdictions including U.S. federal, state and local or foreign countries.
Foreign Currency Translation	'
	Foreign currency translation
	The functional currency of the Company’s foreign subsidiaries is the U.S. dollar.  Accordingly, monetary assets and liabilities in non-functional currency of these subsidiaries are remeasured using exchange rates in effect at the end of the period. Revenues and costs in local currency are remeasured using average exchange rates for the period, except for costs related to those consolidated balance sheet items that are remeasured using historical exchange rates. The resulting remeasurement gains and losses are included in the Company’s consolidated statements of operations. Translation gains and losses have not been significant to date
Segments	'
	Segments
	Operating segments are components of an enterprise for which separate financial information is available and is evaluated regularly by the Company’s chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is the Chief Executive Officer. The Company has two operating segments which are both reportable business segments: (i) Product; and (ii) Service.
Comprehensive Income (Loss)	'
	Comprehensive income (loss)
	Before 2012, there were no components of comprehensive income which were excluded from net income (loss). For the years ended December 31, 2013 and 2012, the Company had small unrealized gains on available-for-sale securities. There were no other components within other comprehensive income for the years ended December 31, 2013
Related Party Transactions Disclosure	'
	Related party transactions
	During the years ended December 31, 2013 and 2012, the Company billed a related party, the University of Chicago Medical Center (“UCMC”), $0.5 million in each year for consulting services and technology solutions. One of the Company's board members, Sharon O’Keefe, is the President of UCMC. These transactions were recorded at arms-length prices. There were no material related party transactions for UCMC in the year ended 2011. During the year ended December 31, 2013 the Company billed a related party, the Hewlett-Packard Company, approximately $9,200 for software and support, at arms’ length prices. Through July of 2013, John N. McMullen, one of the Company’s directors, served as Treasurer & Senior Vice President at Hewlett-Packard. There were no material related party transactions for Hewlett-Packard in the years ended December 31, 2012 and 2011.
Recent Accounting Pronouncements	'
	Recent accounting pronouncements
	In July 2013, the FASB issued new guidance for the gross versus net presentation of unrecognized tax benefits. The FASB concluded that an unrecognized tax benefit should be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) or other tax credit carryforward when settlement in this manner is available under the tax law. The new guidance is effective for the Company's first quarter of 2014, applied prospectively. The Company has the option to apply the rule retrospectively and early adoption is permitted. Adoption of this standard is not expected to impact the financial position or results of operations of the Company.

The_Company_and_Summary_of_Sig2

The Company and Summary of Significant Accounting Policies The Company and Summary of Significant Accounting Policies(Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Allowance for Credit Losses on Financing Receivables [Table Text Block]	'
	The following table presents the changes in the allowance for doubtful accounts:
		Years ended December 31,
	(in thousands)	2013			2012		2011
	Allowance—beginning of period	$	—		$	—	$	(10	)
	Provisions for bad debts	(29		)	—		—
	Provisions charged to other accounts	—			—		—
	Recoveries from bad debts	13			—		10
	Write-offs and other	10			—		—
	Allowance—end of period	$	(6	)	$	—	$	—

Fair_value_of_financial_instru1

Fair value of financial instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities measured at fair value on a recurring basis, by level	'
	The table below summarizes the Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of December 31, 2013 and 2012, respectively. There were no liabilities measured at fair value on a recurring basis for these dates.
		31-Dec-13						31-Dec-12
	(in thousands)	Level 1		Level 2		Total		Level 1		Level 2		Total
	Assets
	Money market funds	$	22,991	$	—	$	22,991	$	45,040	$	—	$	45,040
	Commercial paper	—		900		900		—		32,487		32,487
	U.S. government and agency securities	—		11,279		11,279		—		10,001		10,001
	U.S. Treasury securities	—		5,235		5,235		—		—		—
	Municipal debt securities	—		4,765		4,765		—		—		—
	Corporate debt securities	—		67,055		67,055		—		—		—
	Total assets measured at fair value	$	22,991	$	89,234	$	112,225	$	45,040	$	42,488	$	87,528

Cash_Cash_Equivalents_and_Shor1

Cash, Cash Equivalents and Short-term Investments (Tables)	12 Months Ended
	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]	'
Schedule of cash, cash equivalents and available-for-sale investments	'
	he following tables display gross unrealized gains and gross unrealized losses for cash, cash equivalents and available-for-sale investments for the periods presented:
		As of December 31, 2013
	(in thousands)	Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			value
	Cash and cash equivalents:
	Demand deposits and other cash	$	15,451	$	—	$	—		$	15,451
	Money market funds	22,991		—		—			22,991
	Commercial paper	150		—		—			150
	Corporate debt securities	1,060		—		—			1,060
	Total cash and cash equivalents	39,652		—		—			39,652
	Short-Term Investments:
	Commercial paper	750		—		—			750
	U.S. government agency securities	11,275		5		(1		)	11,279
	U.S. Treasury securities	5,233		2		—			5,235
	Municipal debt securities	4,758		7		—			4,765
	Corporate debt securities	65,982		20		(7		)	65,995
	Total short-term investments	87,998		34		(8		)	88,024
	Total cash, cash equivalents and short-term investments	$	127,650	$	34	$	(8	)	$	127,676
		As of December 31, 2012
	(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair value
	Cash and cash equivalents:
	Demand deposits and other cash	$	39,982	$	—	$	—		$	39,982
	Money market funds	45,040		—		—			45,040
	Commercial paper	7,498		1		—			7,499
	Total cash and cash equivalents	92,520		1		—			92,521
	Short-Term Investments:
	Commercial paper	24,987		1		—			24,988
	U.S. government agency securities	9,998		3		—			10,001
	Total short-term investments	34,985		4		—			34,989
	Total cash, cash equivalents and short-term investments	$	127,505	$	5	$	—		$	127,510
Investments Classified by Contractual Maturity Date [Table Text Block]	'
	Classification of the cash, cash equivalent and short-term investments by contractual maturity was as follows:
	(in thousands)	One year or shorter		Between 1 and 2 years		Total
	Balances as of December 31, 2013
	Cash and cash equivalents (1)	$	39,652	$	—	$	39,652
	Short-term investments	71,464		16,560		88,024
	Cash, cash equivalents and short-term investments	111,116		16,560		127,676
	Balances as of December 31, 2012
	Cash and cash equivalents (1)	$	92,521	$	—	$	92,521
	Short-term investments	34,989		—		34,989
	Cash, cash equivalents and short-term investments	$	127,510	$	—	$	127,510
	(1) Includes demand deposits and other cash, money market funds and other cash equivalent securities, all with 0-90 day maturity at purchase.
	All the above tables exclude restricted cash, primarily held in certificates of deposit, of $0.3 million as of December 31, 2013 and December 31, 2012 which is classified in prepaids and other current assets on the consolidated balance sheet.

Income_loss_per_share_Tables

Income (loss) per share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of the computation of basic and diluted net income (loss) per share	'
	The following table presents the calculation of basic and diluted net income (loss) per share:
		Years ended December 31,
	(in thousands, except for share and per share amounts)	2013				2012			2011
	Numerator:
	Net (loss) income	$	(10,465	)		$	2,893		$	(2,479	)
	Less: undistributed earnings attributable to participating securities	—				(1,366		)	—
	Net (loss) income attributable to common stockholders	$	(10,465	)		$	1,527		$	(2,479	)
	Reallocation of undistributed earnings attributable to participating securities	—				32			—
	Net (loss) income attributable to common stockholders for diluted net (loss) income per share	$	(10,465	)		$	1,559		$	(2,479	)
	Denominator:
	Weighted-average shares used to compute basic net income (loss) per common share	24,621				17,979			3,370
	Effect of potentially dilutive securities:
	Employee stock options and restricted stock units	—				2,547			—
	Stock warrants	—				82			—
	Weighted average shares used to compute diluted income (loss) per common share	24,621				20,608			3,370
	Net (loss) income per share
	Net (loss) income per common share - basic and diluted	($0.43)				$0.08			($0.74)
Schedule of antidilutive securities excluded from computation of earnings per share	'
	For the years ended 2013, 2012 and 2011, the following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:
		As of December 31,
	(in thousands)	2013			2012			2011
	Convertible preferred stock (on an as if converted basis)	—			—			12,916
	Options to purchase common stock	3,335			367			3,808
	Common stock subject to repurchase	25			—			169
	Warrants to purchase convertible preferred stock	—			—			213
	Warrants to purchase common stock	44			—			—
	Restricted stock units	623			25			—
	Restricted stock awards	12			—			—

Goodwill_and_intangible_assets1

Goodwill and intangible assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Finite-Lived Intangible Assets	'
	Intangible assets
	The fair values for acquired intangible assets were determined by management relying in part on valuations performed by independent valuation specialists. Acquisition-related intangible assets are amortized over the life of the assets on an accelerated basis that approximates the expected economic benefit of the assets. This assumption results in amortization that is higher in earlier periods of the useful life. To date there has been no impairment of the Company's intangible assets. The estimated useful lives and carrying value of acquired intangible assets are as follows:
				December 31, 2013						December 31, 2012
	(in thousands)	Weighted average		Gross		Accumulated		Net		Gross		Accumulated		Net
		useful life		carrying		amortization		carrying		carrying		amortization		carrying
		(years)		amount				amount		amount				amount
	Intangible assets:
	Customer relationships	9		$	2,350	$	1,449	$	901	$	2,350	$	1,117	$	1,233
	Developed technology	6		$	1,880	$	1,264	$	616	$	1,880	$	896	$	984
	Trademarks	7		$	70	$	43	$	27	$	70	$	30	$	40
	Non-compete Agreements	2		70		70		—		70		60		10
	Total intangible assets, net			$	4,370	$	2,826	$	1,544	$	4,370	$	2,103	$	2,267
	Amortization of intangible assets was $0.7 million, $0.9 million and $1.0 million for the years ended December 31, 2013, 2012 and 2011, respectively.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	'
	Amortization of acquired intangible assets is reflected in the cost of revenues for developed technology and in operating expenses for the other intangibles. The estimated future amortization of acquired intangible assets as of December 31, 2013 was as follows:
	(in thousands)	Future amortization
	2014	567
	2015	389
	2016	258
	2017	156
	2018	106
	Thereafter	68
	Future amortization expense	$	1,544

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2013
Balance Sheet Components [Abstract]	'
Inventories	'
	Inventories
			December 31,
	(in thousands)		2013				2012
	Raw materials		$	806			$	23
	Finished goods		4,859				2,749
	Total inventories		$	5,665			$	2,772
Property and Equipment	'
	Property and equipment, net
			December 31,
	(in thousands)		2013				2012
	Computer equipment and software		$	7,345			$	4,127
	Furniture, fixtures and equipment		924				886
	Leasehold improvements		2,125				1,654
	Manufacturing tools and equipment		3,081				2,710
	Construction in process		555				1,100
	Property and equipment, at cost		14,030				10,477
	Less: Accumulated depreciation		(8,665		)		(6,846		)
	Property and equipment, net		$	5,365			$	3,631
	Depreciation and amortization expense for property and equipment for the years ended December 31, 2013, 2012 and 2011 was $1.8 million, $1.7 million, and $1.0 million, respectively.
Investment in sales-type leases	'
	Net investment in sales-type leases
	The Company has sales-type leases with terms of 1.25 to 4 years. Sales-type lease receivables are collateralized by the underlying equipment. The components of our net investment in sales-type leases are as follows:
		December 31,
	(in thousands)	2013				2012
	Net minimum lease payments to be received	$	2,597			$	1,063
	Less: Unearned interest income and executory revenue portion	(1,167		)		(527		)
	Net investment in sales-type leases	1,430				536
	Less: Current portion	(620		)		(243		)
	Non-current net investment in sales-type leases	$	810			$	293
	There were no allowances for doubtful accounts on these leases as of December 31, 2013 and 2012. There is no guaranteed or unguaranteed residual value on the leased equipment. The current and non-current net investments in sales-types leases of $0.6 million and $0.8 million as of December 31, 2013 are reported as components of the consolidated balance sheet captions "other receivables" and "other long-tern assets", respectively.
Future Minimum Lease Payments for sales-type Leases	'
	The minimum lease payments expected for future years under sales-type leases as of December 31, 2013 were as follows:
	(in thousands)	Future lease payments
	2014	$	929
	2015	806
	2016	633
	2017	229
	Total	$	2,597
Accrued Liabilities	'
	Accrued payroll and other current liabilities
			December 31,
	(in thousands)		2013				2012
	Payroll and related expenses		$	5,065			$	7,845
	Accrued payables		2,259				1,978
	Deferred rent, current portion		490				591
	Lease financing, current portion		528				212
	Product warranty		840				297
	Sales and use tax payable		259				397
	Other		400				434
	Total accrued payroll and other current liabilities		$	9,841			$	11,754
Schedule of Product Warranty Liability	'
	A reconciliation of the changes in the Company’s warranty reserve for 2013, 2012 and 2011 is as follows:
			Years ended December 31,
	(in thousands)		2013				2012			2011
	Warranty balance at the beginning of the period		$	297			$	983		$	605
	Warranty expense accrued for shipments in period		1,185				540			1,563
	Changes in liability related to pre-existing warranties		536				(242		)	50
	Warranty settlements made		(1,178		)		(984		)	(1,235		)
	Warranty balance at the end of the period		$	840			$	297		$	983

Commitments_Tables

Commitments (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases	'
	Future minimum lease payments at December 31, 2013 under non-cancelable operating leases are as follows:
	(in thousands)	Operating
		leases
	2014	1,540
	2015	1,475
	2016	434
	2017	28
	Total minimum lease payments	$	3,477

Common_stock_Tables

Common stock (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Reserved Shares for Issuance	'
	At December 31, 2013, the Company has reserved shares for issuance of common stock as follows:
		Common Shares
	Reserved under stock option plans	328,519
	Exercise of warrants to purchase common stock	44,491
	Total reserved for issuance	373,010
Schedule of Stock Option Activity	'
	The following table summarizes the combined stock option activity under the 2000 Plan, the 2006 Plan and the 2012 Plan and non-plan stock option agreements:
			Options outstanding
			Number			Weighted			Weighted		Aggregate
			of options			average			average		intrinsic
						exercise			remaining		value
						price			contractual term
									(in years)		(in thousands)
	Outstanding at December 31, 2012		3,187,559			$	7.51		6.81		$	56,362
	Options granted		675,460			16.85
	Options exercised		(420,492	)		3.94
	Options canceled		(142,102	)		12.17
	Options expired		(13,221	)		22.47
	Outstanding at December 31, 2013		3,287,204			$	9.62		6.45		$	24,880
	Options vested and expected to vest as of December 31, 2013		3,238,937			$	9.51		6.41		$	24,824
	Options vested and exercisable as of December 31, 2013		1,996,061			$	5.82		5.05		$	21,169
Options, Grants in Period, Wtd Avg Grant Date Fair Value	'
	Using the Black-Scholes option-pricing model, the weighted-average grant-date fair value of options granted to employees during the years ended December 31, 2013, 2012 and 2011 was $7.34 per share, $10.19 per share, and $3.30 per share, respectively. Further information regarding the value of employee options vested and exercised during the years ended December 31, 2013, 2012 and 2011 is set forth below.
			Years ended December 31,
	(in thousands)		2013				2012			2011
	Grant-date fair value of options vested during period		$	3,053			$	2,256		$	881
	Intrinsic value of options exercised during period		5,896				24,846			2,565
Schedule of Valuation Assumptions for Stock Options	'
	The Company uses the Black-Scholes option-pricing model to calculate the fair value of stock options on their grant date. This model requires the following major inputs: the estimated fair value of the underlying common stock, the expected term of the option, the expected volatility of the underlying common stock over the expected life of the option, the risk-free interest rate and expected dividend yield. The following assumptions were used for each respective period for employee stock-based compensation:
			Years ended December 31,
			2013		2012		2011
	Expected Term (in years)		5.38 - 5.43		5.23 - 5.60		5.49 - 5.73
	Volatility		46.7% - 48.1%		47.9% - 48.7%		44.7% - 47.6%
	Risk-free interest rate		0.81% - 1.80%		0.72% - 1.03%		0.98% - 2.48%
	Dividend yield		0.00%		0.00%		0.00%
Schedule of Valuation Assumptions for ESPP	'
	The Company uses the Black-Scholes option-pricing model to calculate the fair value of periodic ESPP offerings on their offer date. The following assumptions were used for each respective period for the ESPP:
			Years ended December 31,
			2013		2012
	Expected Term (in years)		0.25 - 0.50		0.50 - 0.88
	Volatility		33.3% - 36.0%		43.2% - 50.0%
	Risk-free interest rate		0.05% - 0.13%		0.14% - 0.18%
	Dividend yield		0.00%		0.00%
Summary of the restricted stock activty	'
	A summary of the restricted stock activity for the year ended December 31, 2013 is presented below:
			Restricted Stock Awards						Restricted Stock Units
			Number of shares			Weighted Average Grant Date Fair Value per Share			Number of shares			Weighted Average Grant Date Fair Value per Share
	Outstanding at December 31, 2012		24,152			$	12.42		373,908			$	25.34
	Granted		—			—			558,686			16.91
	Vested		(12,076	)		12.42			(117,245	)		25.18
	Forfeited		—			—			(60,078	)		23.63
	Outstanding at December 31, 2013		12,076			$	12.42		755,271			$	19.24
Schedule of Share-based Comp for Nonemployee Services	'
	The fair value of the stock options granted to non-employees was calculated using the Black-Scholes option-pricing model with the following assumptions:
			As of December 31,
				2012		2011
	Expected Term (in years)			8.67		8.83 - 10.0
	Volatility			46.70%		45.0% - 54.0%
	Risk-free interest rate			1.77%		1.63% - 3.41%
	Dividend yield			0.00%		0.00%
Schedule of Share-based Comp Allocation of Period Costs	'
	The following table presents the stock-based compensation allocation of expense (both for employees and non-employees):
			Years ended December 31,
	(in thousands)		2013				2012			2011
	Cost of revenue		$	967			$	421		$	30
	Research and development		861				449			121
	Sales and marketing		2,942				1,262			285
	General and administrative		3,897				2,100			1,022
	Total stock-based compensation		$	8,667			$	4,232		$	1,458

Segments_Tables

Segments (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Summary of the operating segments	'
	The following table presents a summary of the operating segments:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Revenue
	Product	$	62,393		$	65,028		$	50,322
	Service	40,105			35,929			29,181
	Total revenue	102,498			100,957			79,503
	Cost of revenue
	Product	21,714			21,551			17,465
	Service	16,595			15,070			14,042
	Total cost of revenue	38,309			36,621			31,507
	Gross profit
	Product	40,679			43,477			32,857
	Service	23,510			20,859			15,139
	Total gross profit	64,189			64,336			47,996
	Operating expenses	74,749			59,440			48,802
	Interest income (expense), net and other	204			(1,376		)	(1,388		)
	(Loss) income before income taxes	$	(10,356	)	$	3,520		$	(2,194	)
Summary of revenue by product line	'
	The following tables present the Company’s revenue by product line, as well as revenue and long-lived assets by geographic region.
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Revenue
	Product
	Device	$	46,636		$	47,725		$	37,088
	Software	15,757			17,303			13,234
	Total product	62,393			65,028			50,322
	Service
	Maintenance and support	31,559			26,237			21,439
	Professional services and training	8,546			9,692			7,742
	Total service	40,105			35,929			29,181
	Total revenue	$	102,498		$	100,957		$	79,503
Schedule of revenue by geographic region	'
	The Company’s revenue by geographic region, based on customer location, is summarized as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Revenue
	United States	$	91,763		$	90,108		$	73,719
	International	10,735			10,849			5,784
	Total revenue	$	102,498		$	100,957		$	79,503
Schedule of Geographic Disclosure of Long-Lived Assets	'
	The Company’s tangible long-lived assets by geographic region, consisting of net property and equipment, are summarized as follows:
		December 31,
	(in thousands)	2013			2012			2011
	Property and equipment, net
	United States	$	5,249		$	3,465		$	2,646
	International	116			166			55
	Total property and equipment, net	$	5,365		$	3,631		$	2,701

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Components of income (loss) before income tax	'
	The components of (loss) income before income taxes are as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	United States	$	(10,812	)	$	3,205		$	(2,421	)
	International	456			315			227
	Total (loss) income before income taxes	$	(10,356	)	$	3,520		$	(2,194	)
Components of the provision (benefit) for income taxes	'
	The components of the provision for income taxes are as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	Current
	Federal	$	—		$	7		$	25
	State	(40		)	512			156
	Foreign	74			38			55
		34			557			236
	Deferred
	Federal	60			60			60
	State	4			10			9
	Foreign	11			—			(20		)
		75			70			49
	Total income tax provision	$	109		$	627		$	285
Reconciliation of the provision for income taxes at the statutory rate	'
	Reconciliation of the provision for income taxes at the statutory rate to the Company’s provision for income tax is as follows:
		Years ended December 31,
	(in thousands)	2013			2012			2011
	U.S. federal (tax benefit) provision at statutory rate	$	(3,567	)	$	1,197		$	(746	)
	State (tax benefit) income taxes, net of federal benefit	(338		)	151			109
	Foreign income taxes at rates other than the US rate	(28		)	(10		)	(72		)
	Stock-based compensation	549			397			340
	Change in valuation allowance	3,911			(1,494		)	546
	Non-deductible warrant expense	—			625			334
	Research and development credits	(527		)	(220		)	(290		)
	Other	109			(19		)	64
	Total	$	109		$	627		$	285
Deferred tax assets and liabilities	'
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented:
		As of December 31,
	(in thousands)	2013			2012
	Deferred tax assets
	Net operating loss carryforward	$	11,873		$	14,270
	Research and development credits	2,809			2,637
	Depreciation and amortization	288			84
	Reserves and accruals	6,060			4,502
	Total deferred tax assets	21,030			21,493
	Valuation allowance	(21,030		)	(21,193		)
	Net deferred tax assets	—			300
	Deferred tax liabilities	(216		)	(451		)
	Net deferred tax liabilities	$	(216	)	$	(151	)
Valuation allowance for DTA rollforward [Table Text Block]	'
	The following table displays by contributing factor the changes in the valuation allowance for deferred tax assets since January 1, 2011:
		Years Ended December 31,
	(in thousands)	2013			2012			2011
	Balance at the beginning of the period	$	21,193		$	22,687		$	21,588
	Net operating loss utilization	(2,397		)	(3,505		)	(884		)
	R&D tax credit (decrease) increase	172			272			383
	Depreciation and amortization increase (decrease)	204			29			(309		)
	Reserves and accruals increase	1,558			1,273			1,581
	Deferred tax assets decrease	300			437			328
	Balance at the end of the period	$	21,030		$	21,193		$	22,687
Changes in the unrecognized tax benefits	'
	The following table reflects changes in the unrecognized tax benefits since January 1, 2012:
		Years ended December 31,
	(in thousands)	2013			2012
	Gross amount of unrecognized tax benefits as of the beginning of the period	$	1,079		$	908
	Increases related to prior year tax provisions	30			7
	Decreases related to prior year tax provisions	(239		)	—
	Increases related to current year tax provisions	222			164
	Gross amount of unrecognized tax benefits as of the end of the period	$	1,092		$	1,079

The_Company_and_Summary_of_Sig3

The Company and Summary of Significant Accounting Policies Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sale of Stock [Line Items]	'	'	'	'
No. of healthcare and non healthcare installations worldwide	1,200	'	'	'
Document Period End Date	31-Dec-13	'	'	'
Maintenance services revenue recognition period	'1 year	'	'	'
Accumulated deficit	($64,433,000)	($53,968,000)	'	'
Cash, Cash Equivalents, and Short-term Investments	127,700,000	'	'	'
Restricted cash	305,000	304,000	'	'
Capitalized Computer Software, Additions	2,100,000	1,100,000	300,000	'
No. of revenue customers with 10% or greater concentration	0	0	0	'
No of Acct Rec customers with 10% or greater concentration	0	0	'	'
Impairment of Intangibles (Excl. Goodwill)	0	0	0	'
Goodwill, Impairment Loss	0	0	0	'
No of operating segments	2	'	'	'
Deferred Tax Assets, Valuation Allowance	21,030,000	21,193,000	22,687,000	21,588,000
Maximum	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Professional service revenue recognition period	'P12W	'	'	'
Product Liability, Warranty Period	'3 years	'	'	'
Minimum	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Professional service revenue recognition period	'P2W	'	'	'
Product Liability, Warranty Period	'1 year	'	'	'
Restricted stock units	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Vesting percentage on 1st anniversary of grant (percent)	33.33%	'	'	'
Vesting percentage on 2nd anniversary of grant (percent)	33.33%	'	'	'
Vesting percentage on 3rd anniversary of grant (percent)	33.34%	'	'	'
Director | Restricted Stock [Member]	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Vesting percentage on 1st anniversary of grant (percent)	50.00%	50.00%	'	'
Vesting percentage on 2nd anniversary of grant (percent)	50.00%	50.00%	'	'
Director | Restricted stock units	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Vesting percentage on 1st anniversary of grant (percent)	100.00%	'	'	'
Sharon O'Keefe [Member] | Service | University of Chicago Medical Center [Member]	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Related Party Transaction, Amounts of Transaction	500,000	500,000	0	'
John N. McMullen [Member] | Service | Hewlett-Packard Company [Member]	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Related Party Transaction, Amounts of Transaction	$9,200	$0	$0	'
Property and Equipment, excluding LHI and major ERP [Member]	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Property, Plant and Equipment, Useful Life	'3 years	'	'	'
Not major ERP implementation [Member] | Software and Software Development Costs [Member]	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Property, Plant and Equipment, Useful Life	'3 years	'	'	'
Major ERP implementation [Member] | Software and Software Development Costs [Member]	'	'	'	'
Sale of Stock [Line Items]	'	'	'	'
Property, Plant and Equipment, Useful Life	'5 years	'	'	'

The_Company_and_Summary_of_Sig4

The Company and Summary of Significant Accounting Policies Sales type lease data (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]	'	'
sales type capital leases transfered to banks	$2,200,000	$3,800,000
financing liability for future executory services on transfered leases	800,000	1,100,000
Capital Leases, Net Investment in Sales Type Leases	$1,430,000	$536,000

The_Company_and_Summary_of_Sig5

The Company and Summary of Significant Accounting Policies Allowance for Doubtful Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in Allowance for Doubtful Accounts [Roll Forward]	'	'	'
Allowance—beginning of period	$0	$0	($10)
Provisions for bad debts	-29	0	0
Provisions charged to other accounts	0	0	0
Allowance for Loan and Lease Loss, Recovery of Bad Debts	13	0	10
Write-offs and other	10	0	0
Allowance—end of period	($6)	$0	$0

The_Company_and_Summary_of_Sig6

The Company and Summary of Significant Accounting Policies The Company and significant accounting policies - Convertible preferred stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Conversion of Stock, Amount Converted	($53,356,000)	'
Convertible Preferred Stock, Nonredeemable or Redeemable, Issuer Option, Value	'	53,000,000
Preferred Stock, Liquidation Preference, Value	'	$53,600,000

The_Company_and_Summary_of_Sig7

The Company and Summary of Significant Accounting Policies The company and significant accounting policies - Deferred Costs of Revenue (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Costs of Revenue [Abstract]	'	'
Deferred cost of revenues	$144,000	$4,000

Fair_value_of_financial_instru2

Fair value of financial instruments Schedule of assets and liabilities measured at fair value on a recurring basis, by level (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets, Fair Value Disclosure [Abstract]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	$39,652	$92,521
Available-for-sale Securities	88,024	34,989
Fair Value, Measurements, Recurring | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Total assets measured at fair value	22,991	45,040
Fair Value, Measurements, Recurring | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Total assets measured at fair value	89,234	42,488
Fair Value, Measurements, Recurring | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Total assets measured at fair value	112,225	87,528
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	22,991	45,040
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	22,991	45,040
Fair Value, Measurements, Recurring | Commercial paper | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring | Commercial paper | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	900	32,487
Fair Value, Measurements, Recurring | Commercial paper | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	900	32,487
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	11,279	10,001
Fair Value, Measurements, Recurring | U.S. government agency securities | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	11,279	10,001
Fair Value, Measurements, Recurring | US Treasury Securities [Member] | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring | US Treasury Securities [Member] | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	5,235	0
Fair Value, Measurements, Recurring | US Treasury Securities [Member] | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	5,235	0
Fair Value, Measurements, Recurring | US States and Political Subdivisions Debt Securities [Member] | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring | US States and Political Subdivisions Debt Securities [Member] | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	4,765	0
Fair Value, Measurements, Recurring | US States and Political Subdivisions Debt Securities [Member] | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	4,765	0
Fair Value, Measurements, Recurring | Corporate Debt Securities [Member] | Level 1	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	0	0
Fair Value, Measurements, Recurring | Corporate Debt Securities [Member] | Level 2	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	67,055	0
Fair Value, Measurements, Recurring | Corporate Debt Securities [Member] | Total	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Available-for-sale Securities	$67,055	$0

Cash_Cash_Equivalents_and_Shor2

Cash, Cash Equivalents and Short-term Investments (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash and cash equivalents:	'	'
Amortized Cost	$39,652	$92,520
Unrealized Gains	0	1
Unrealized Losses	0	0
Fair value	39,652	92,521
Short-Term Investments:	'	'
Amortized Cost	87,998	34,985
Unrealized Gains	34	4
Unrealized Losses	-8	0
Fair value	88,024	34,989
Cash, Cash Equivalents, and Short-term Investments [Abstract]	'	'
Amortized Cost	127,650	127,505
Unrealized Gains	34	5
Unrealized Losses	-8	0
Fair value	127,676	127,510
Commercial paper	'	'
Short-Term Investments:	'	'
Amortized Cost	750	24,987
Unrealized Gains	0	1
Unrealized Losses	0	0
Fair value	750	24,988
U.S. government agency securities	'	'
Short-Term Investments:	'	'
Amortized Cost	11,275	9,998
Unrealized Gains	5	3
Unrealized Losses	-1	0
Fair value	11,279	10,001
US Treasury Securities [Member]	'	'
Short-Term Investments:	'	'
Amortized Cost	5,233	'
Unrealized Gains	2	'
Unrealized Losses	0	'
Fair value	5,235	'
US States and Political Subdivisions Debt Securities [Member]	'	'
Short-Term Investments:	'	'
Amortized Cost	4,758	'
Unrealized Gains	7	'
Unrealized Losses	0	'
Fair value	4,765	'
Corporate Debt Securities [Member]	'	'
Short-Term Investments:	'	'
Amortized Cost	65,982	'
Unrealized Gains	20	'
Unrealized Losses	-7	'
Fair value	65,995	'
Demand deposis and other cash	'	'
Cash and cash equivalents:	'	'
Amortized Cost	15,451	39,982
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair value	15,451	39,982
Money Market Funds [Member]	'	'
Cash and cash equivalents:	'	'
Amortized Cost	22,991	45,040
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair value	22,991	45,040
Commercial paper	'	'
Cash and cash equivalents:	'	'
Amortized Cost	150	7,498
Unrealized Gains	0	1
Unrealized Losses	0	0
Fair value	150	7,499
Corporate Debt Securities [Member]	'	'
Cash and cash equivalents:	'	'
Amortized Cost	1,060	'
Unrealized Gains	0	'
Unrealized Losses	0	'
Fair value	$1,060	'

Cash_Cash_Equivalents_and_Shor3

Cash, Cash Equivalents and Short-term Investments Classification by contractual maturity of cash, cash equivalents and short-term investments (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	$39,652	$92,521
Available-for-sale Securities	88,024	34,989
Cash, Cash Equivalents And Short Term Investments, Fair Value Disclosure	127,676	127,510
Maturity up to one year [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	39,652	92,521
Available-for-sale Securities	71,464	34,989
Cash, Cash Equivalents And Short Term Investments, Fair Value Disclosure	111,116	127,510
maturity between 1 and 2 years [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-sale Securities	16,560	0
Cash, Cash Equivalents And Short Term Investments, Fair Value Disclosure	$16,560	$0

Cash_Cash_Equivalents_and_Shor4

Cash, Cash Equivalents and Short-term Investments Restricted cash (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Cash and Cash Equivalents - Restricted Cash [Abstract]	'	'
Restricted cash	$305	$304

Income_loss_per_share_Schedule

Income (loss) per share Schedule of the computation of basic and diluted net income (loss) per share (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic and diluted earnings per share	'	'	'
Annual dividend rate, conv. preferred stock	8.00%	'	'
participating securities	26,463	'	'
Numerator:	'	'	'
Net (loss) income	($10,465)	$2,893	($2,479)
Less: undistributed earnings attributable to participating securities	0	-1,366	0
Net (loss) income attributable to common stockholders	-10,465	1,527	-2,479
Dilutive Securities, Effect on Basic Earnings Per Share	0	32	0
Net Income (Loss) Available to Common Stockholders, Diluted	($10,465)	$1,559	($2,479)
Denominator:	'	'	'
Weighted-average shares used to compute basic net income (loss) per common share	24,621,000	17,979,000	3,370,000
Employee stock options and restricted stock units	0	2,547,000	0
Stock warrants	0	82,000	0
Weighted average shares used to compute diluted income (loss) per common share	24,621,000	20,608,000	3,370,000
Net (loss) income per share	'	'	'
Basic and diluted	($0.43)	$0.08	($0.74)

Income_loss_per_share_Schedule1

Income (loss) per share Schedule of antidilutive securities excluded from computation of earnings per share (Details)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Convertible preferred stock (on an as if converted basis)	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	12,916
Options to purchase common stock	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,335	367	3,808
Common stock subject to repurchase	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	25	0	169
Convertible Preferred Stock Warrant	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	213
Warrants to purchase common stock	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	44	0	0
Restricted stock units	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	623	25	0
Restricted Stock Awards	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12	0	0

Goodwill_and_intangible_assets2

Goodwill and intangible assets Schedule of Finite-Lived Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross carrying amount	$4,370,000	$4,370,000	'
Accumulated amortization	2,826,000	2,103,000	'
Finite-Lived Intangible Assets, Net	1,544,000	2,267,000	'
Goodwill [Abstract]	'	'	'
Goodwill	5,575,000	5,575,000	'
Impairment and Amortization [Abstract]	'	'	'
Goodwill, Impairment Loss	0	0	0
Impairment of Intangibles (Excl. Goodwill)	0	0	0
Amortization expense	700,000	900,000	1,000,000
Customer relationships	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average useful life (years)	'9 years	'	'
Gross carrying amount	2,350,000	2,350,000	'
Accumulated amortization	1,449,000	1,117,000	'
Finite-Lived Intangible Assets, Net	901,000	1,233,000	'
Developed technology	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average useful life (years)	'6 years	'	'
Gross carrying amount	1,880,000	1,880,000	'
Accumulated amortization	1,264,000	896,000	'
Finite-Lived Intangible Assets, Net	616,000	984,000	'
Trademarks	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average useful life (years)	'7 years	'	'
Gross carrying amount	70,000	70,000	'
Accumulated amortization	43,000	30,000	'
Finite-Lived Intangible Assets, Net	27,000	40,000	'
Non-compete Agreements	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average useful life (years)	'2 years	'	'
Gross carrying amount	70,000	70,000	'
Accumulated amortization	70,000	60,000	'
Finite-Lived Intangible Assets, Net	$0	$10,000	'

Goodwill_and_intangible_assets3

Goodwill and intangible assets Future amortization schedule (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Goodwill and intangible assets [Abstract]	'	'
2014	$567	'
2015	389	'
2016	258	'
2017	156	'
2018	106	'
Thereafter	68	'
Finite-Lived Intangible Assets, Net	$1,544	$2,267

Goodwill_and_intangible_assets4

Goodwill and intangible assets May 3 2013 one day share price decline (Details)	3-May-13
Goodwill and Intangible - triggering event [Abstract]	'
May 3 2013 One-day percent share price decline	37.00%

Balance_Sheet_Components_Inven

Balance Sheet Components Inventories (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Inventory, Net [Abstract]	'	'
Raw materials	$806	$23
Finished goods	4,859	2,749
Total inventories	$5,665	$2,772

Balance_Sheet_Components_Prope

Balance Sheet Components Property and Equipment (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and equipment, gross	$14,030	$10,477	'
Less: Accumulated depreciation	-8,665	-6,846	'
Property and equipment, net	5,365	3,631	2,701
Computer equipment and software	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and equipment, gross	7,345	4,127	'
Furniture, fixtures and equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and equipment, gross	924	886	'
Leasehold improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and equipment, gross	2,125	1,654	'
Manufacturing tools and equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and equipment, gross	3,081	2,710	'
Construction in process	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, Plant and equipment, gross	$555	$1,100	'

Balance_Sheet_Components_Depre

Balance Sheet Components Depreciation, depletion, amortization (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property-Equipment Deepreciation and amortization [Abstract]	'	'	'
Depreciation and amortization	$1.80	$1.70	$1

Balance_Sheet_Components_Balan

Balance Sheet Components Balance sheet components - investment in sales type leases (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013
In Thousands, unless otherwise specified			Minimum	Maximum
Investment in Sales Type Leases	'	'	'	'
Capital Leases, Net Investment in Sales Type Leases, Minimum Payments to be Received	$2,597	$1,063	'	'
Capital Leases, Net Investment in Sales Type Leases, Deferred Income	-1,167	-527	'	'
Capital Leases, Net Investment in Sales Type Leases	1,430	536	'	'
Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Current	-620	-243	'	'
Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Noncurrent	$810	$293	'	'
Lease Term [Abstract]	'	'	'	'
Lessor Leasing Arrangements, Operating Leases, Term of Contract	'	'	'1 year 3 months	'4 years

Balance_Sheet_Components_Balan1

Balance Sheet Components Balance sheet components - sales type lease Future Payments (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Lessors schedule of future minimum lease payments [Line Items]	'	'
Capital Leases, Future Minimum Payments Due, Next Twelve Months	$929	'
Capital Leases, Future Minimum Payments Due in Two Years	806	'
Capital Leases, Future Minimum Payments Due in Three Years	633	'
Capital Leases, Future Minimum Payments Due in Four Years	229	'
Capital Leases, Net Investment in Sales Type Leases, Minimum Payments to be Received	$2,597	$1,063

Balance_Sheet_Components_Accru

Balance Sheet Components Accrued Liabilities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accrued Liabilities, Current [Abstract]	'	'
Payroll and related expenses	$5,065	$7,845
Accrued payables	2,259	1,978
Deferred rent, current portion	490	591
Lease financing, current portion	528	212
Product warranty	840	297
Sales and use tax payable	259	397
Other	400	434
Total accrued payroll and other current liabilities	$9,841	$11,754

Balance_Sheet_Components_Balan2

Balance Sheet Components Balance sheet components Product Warranties (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
movement in std product warranty liability [Roll Forward]	'	'	'
Warranty balance at the beginning of the period	$297	$983	$605
Warranty expense accrued for shipments in period	'	540	'
Changes in liability related to pre-existing warranties	536	'	50
Warranty settlements made	'	-984	'
Warranty balance at the end of the period	$840	$297	$983

Commitments_Schedule_of_Future

Commitments Schedule of Future Minimum Rental Payments for Operating Leases (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leases, Rent Expense, Net [Abstract]	'	'	'
Rent expense	$2,000,000	$1,900,000	$1,700,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'	'	'
2014	1,540,000	'	'
2015	1,475,000	'	'
2016	434,000	'	'
2017	28,000	'	'
Total minimum lease payments	3,477,000	'	'
Inventories	'	'	'
Unrecorded Unconditional Purchase Obligation [Line Items]	'	'	'
Non-cancelable purchase commitment with a third party manufacturer to purchase inventory	$3,100,000	$4,100,000	'

Common_stock_Details

Common stock (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'
Common stock, shares authorized	100,000,000	100,000,000
Common stock, par value	$0.00	$0.00

Common_stock_Reserved_shares_f

Common stock (Reserved shares for issuance of common stock) (Details)	Dec. 31, 2013
Class of Stock [Line Items]	'
Common stock (in shares)	373,010
Options to purchase common stock	'
Class of Stock [Line Items]	'
Common stock (in shares)	328,519
Stock warrants	'
Class of Stock [Line Items]	'
Common stock (in shares)	44,491

Common_stock_Incentive_stock_o

Common stock (Incentive stock option plans) (Details)	12 Months Ended
	Dec. 31, 2013
Class of Stock [Line Items]	'
Number of equity incentive plans	3
Stock options | 2012 Plan	'
Class of Stock [Line Items]	'
Vesting period (in years)	'4 years
Award vesting percentage at end of one year (percent)	25.00%
Expiration period of granted options (in years)	'10 years

Common_stock_Early_exercise_of

Common stock (Early exercise of stock options) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, except Share data, unless otherwise specified
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'
Unvested shares subject to repurchase rights at original issuance price (in shares)	14,360	48,260	112,967
Exercise of unvested stock options included in accrued liabilities	$100	$198	$400

Common_stock_Options_outstandi

Common stock (Options outstanding) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Change in Fair Value Of Warrant Liability Recorded in Other Income (Expense)	$0	($1,600,000)	($1,000,000)
Weighted-average grant-date fair value (in dollars per share)	$7.34	$10.19	$3.30
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'	'
Number of Options, Outstanding, Beginning balance	3,187,559	'	'
Options granted	-675,460	'	'
Options exercised	-420,492	'	'
Options cancelled	-142,102	'	'
Options expired	-13,221	'	'
Number of Options, Outstanding, Ending balance	3,287,204	3,187,559	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'	'
Weighted Average Exercise Price, Outstanding, Beginning balance	$7.51	'	'
Options granted	$16.85	'	'
Options exercised	$3.94	'	'
Options cancelled	$12.17	'	'
Options expired	$22.47	'	'
Weighted Average Exercise Price, Outstanding, Ending balance	$9.62	$7.51	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract]	'	'	'
Aggregate Intrinsic Value, Options Outstanding	24,880,000	56,362,000	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]	'	'	'
Options vested and expected to vest (Number of options)	3,238,937,000	'	'
Options vested and expected to vest (Wtd avg exercise price)	$9,510	'	'
Options vested and expected to vest (Wtd avg remaining contractual term)	'6 years 4 months 28 days	'	'
Options vested and expected to vest (Aggregate intrinsic value)	24,824,000	'	'
Options vested and exercisable (Number of options)	1,996,061,000	'	'
Options vested and exercisable (Wtd avg exercise price)	$5,820	'	'
Options vested and exercisable (Wtd avg remaining contractual term)	'5 years 0 months 18 days	'	'
Stock options	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Unrecognized net compensation cost related to options	$8,200,000	'	'
Weighted average period (in years)	'2 years 6 months 4 days	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'	'
Wtd Avg Remaining Contractual Term, Options Outstanding	'6 years 5 months 12 days	'6 years 9 months 22 days	'
Wtd Avg Remaining Contractual Term, Options Outstanding	'6 years 5 months 12 days	'6 years 9 months 22 days	'

Common_stock_Fair_value_option

Common stock (Fair value option pricing model) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Options - intrinsic value and grant date fair value [Abstract]	'	'	'
Options vested and exercisable (Aggregate intrinsic value)	$21,169	'	'
Weighted-average grant-date fair value (in dollars per share)	$7.34	$10.19	$3.30
Stock options	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected life (years)	'	'	'5 years 9 months 7 days
Dividend yield	0.00%	0.00%	0.00%
Stock options | Minimum	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected life (years)	'5 years 2 months 23 days	'5 years 5 months 27 days	'
Expected Volatility Rate	47.90%	44.70%	44.00%
Risk-free interest rate	0.72%	0.98%	1.90%
Stock options | Maximum	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected life (years)	'5 years 7 months 6 days	'5 years 8 months 23 days	'
Expected Volatility Rate	48.70%	47.60%	44.50%
Risk-free interest rate	1.03%	2.48%	2.63%

Common_stock_Employee_options_

Common stock (Employee options vested and exercised) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Options, Vested in Period, Fair Value	$3,053	$2,256	$881
Options, Exercises in Period, Total Intrinsic Value	$5,896	$24,846	$2,565

Common_stock_Restricted_stock_

Common stock (Restricted stock awards and restricted stock units) (Details) (Restricted Stock Units (RSUs), USD $)	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Outstanding, Number of Shares	755,271	373,908
Outstanding, Wtd Ag Grant Date Fair Value	$19.24	$25.34
Vesting percentage on 1st anniversary of grant (percent)	33.33%	'
Vesting percentage on 2nd anniversary of grant (percent)	33.33%	'
Vesting percentage on 3rd anniversary of grant (percent)	33.34%	'
Director	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Vesting percentage on 1st anniversary of grant (percent)	100.00%	'

Common_stock_Summary_of_restri

Common stock (Summary of restricted stock activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Awards	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Weighted average period (in years)	'1 month 10 days	'
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$16,000	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'
Outstanding, Number of Shares	24,152	'
Granted, Number of Shares	0	'
Vested, Number of Shares	12,076	'
Forfeited, Number of Shares	0	'
Outstanding, Number of Shares	12,076	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]	'	'
Granted, Wtd Avg Grant Date Fair Value	$0	'
Vested, Wtd Avg Grant Date Fair Value	$12.42	'
Forfeitured, Wtd Avg Grant Date Fair Value	$0	'
Outstanding, Wtd Ag Grant Date Fair Value	$12.42	$12.42
Restricted Stock Units	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Weighted average period (in years)	'2 years 0 months 26 days	'
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$10,800,000	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'
Outstanding, Number of Shares	373,908	'
Granted, Number of Shares	558,686	'
Vested, Number of Shares	117,245	'
Forfeited, Number of Shares	60,078	'
Outstanding, Number of Shares	755,271	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]	'	'
Granted, Wtd Avg Grant Date Fair Value	$16.91	'
Vested, Wtd Avg Grant Date Fair Value	$25.18	'
Forfeitured, Wtd Avg Grant Date Fair Value	$23.63	'
Outstanding, Wtd Ag Grant Date Fair Value	$19.24	$25.34

Common_stock_Unrecognized_net_

Common stock (Unrecognized net compensation) (Details)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Expected dividend yield	0.00%

Common_stock_Granted_employee_

Common stock (Granted employee and nonemployee options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based for Nonemployee Services, Securities Issued	'	'	67,916
Number of Options Granted	675,460	'	'
Option Exercise Price	$16.85	'	'
Fair Value of Common Stock per Share	$7.34	$10.19	$3.30

Common_stock_Nonemployee_stock

Common stock (Nonemployee stock-based compensation) (Details) (USD $)	12 Months Ended				12 Months Ended				3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2012	Dec. 31, 2010
					Nonemployees	Nonemployees	Nonemployees	2010 Revenue Performance [Member]	2011 Revenue Performance [Member]	2011 Revenue Performance [Member]
								Equity Option [Member]	Equity Option [Member]	Equity Option [Member]
								ExperiaHealth, Inc.	ExperiaHealth, Inc.	ExperiaHealth, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'	'
Stock-based compensation expense	$8,667,000	$4,232,000	$1,458,000	'	$0	$29,000	$907,000	'	'	'
Share-based for Nonemployee Services, Securities Issued	'	'	67,916	'	'	'	'	41,666	'	41,666
Nonemployee Shares Vested from Performance Award	'	'	'	'	'	'	'	35,452	41,666	'
Business Combination, Contingent Consideration, Liability	'	'	$419,000	$448,000	'	'	'	'	'	'

Common_stock_Nonemployee_fair_

Common stock (Nonemployee fair value stock options assumptions) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Share-based Goods and Nonemployee Services Transaction [Line Items]	'	'
Risk-free interest rate	1.77%	'
Expected life	'8 years 8 months 1 day	'
Expected volatility	46.70%	'
Dividend yield	0.00%	0.00%
Minimum	'	'
Share-based Goods and Nonemployee Services Transaction [Line Items]	'	'
Risk-free interest rate	'	1.63%
Expected life	'	'8 years 9 months 29 days
Expected volatility	'	45.00%
Maximum	'	'
Share-based Goods and Nonemployee Services Transaction [Line Items]	'	'
Risk-free interest rate	'	3.41%
Expected life	'	'10 years
Expected volatility	'	54.00%

Common_stock_Recognized_expens

Common stock (Recognized expenses nonemployee stock-based compensation) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
				Nonemployees	Nonemployees	Nonemployees	Business Acquisition, Acquiree [Domain]
Share-based Goods and Nonemployee Services Transaction [Line Items]	'	'	'	'	'	'	'
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	'	'	'	'	'	'	$100,000
Stock-based compensation expense	$8,667,000	$4,232,000	$1,458,000	$0	$29,000	$907,000	'

Common_stock_Common_stock_Shar

Common stock (Common stock) Share-based compensation allocated to expense captions (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	$8,667,000	$4,232,000	$1,458,000
Cost of Sales [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	967,000	421,000	30,000
Research and Development Expense [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	861,000	449,000	121,000
Selling and Marketing Expense [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	2,942,000	1,262,000	285,000
General and Administrative Expense [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	$3,897,000	$2,100,000	$1,022,000

Common_stock_Common_Stock_ESPP

Common stock Common Stock (ESPP B-S-M option pricing model assumptions) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
ESPP plan details [Abstract]	'	'
Stock Shares Issued During Period, ESPP	215,039	0
Common stock (in shares) reserved for ESPP	373,010	'
Two Thousand Twelve Employee Stcok Purchase Plan [Member] | Employee Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Dividend yield	0.00%	0.00%
ESPP plan details [Abstract]	'	'
ESPP-Maximum Annual Purchase by Employee, Percent	15.00%	'
ESPP-Discount of market Price	85.00%	'
ESPP-Offering Period, Initial Offer	'11 months	'
ESPP-Offering Period, Subsequent Offers	'6 months	'
Share-based Comp, Per Share Wtd Avg Price of Shares Purchased	13.92	'
Common stock (in shares) reserved for ESPP	193,920	'
Two Thousand Twelve Employee Stcok Purchase Plan [Member] | Employee Stock [Member] | Minimum	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Expected life (years)	'6 months	'
Expected Volatility Rate	43.20%	'
Risk-free interest rate	0.14%	'
Two Thousand Twelve Employee Stcok Purchase Plan [Member] | Employee Stock [Member] | Maximum	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Expected life (years)	'11 months	'
Expected Volatility Rate	50.00%	'
Risk-free interest rate	0.18%	'

Common_stock_Common_stock_and_

Common stock Common stock and preferred stock warrants (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in Fair Value Of Warrant Liability Recorded in Other Income (Expense)	$0	($1,600,000)	($1,000,000)
Proceeds from Warrant Exercises	226,000	0	0
Common stock	'	'	'
Class of Warrant or Right, Outstanding	44,491	'	'
Class of Warrant or Right, Exercise Price of Warrants or Rights	6.61	'	'
Cashless Exercise [Member] | Common stock	'	'	'
Stock Issued During Period, Shares, Exercise of Stock Warrants	0	78,487	'
Gross Stock Warrants used in cashless exercise	'	108,155	'
Cash Exercise [Member]	'	'	'
Proceeds from Warrant Exercises	226,000	'	'
Cash Exercise [Member] | Common stock	'	'	'
Stock Issued During Period, Shares, Exercise of Stock Warrants	34,142	0	'
Proceeds from Warrant Exercises	$200,000	'	'

Segments_Summary_of_the_operat

Segments Summary of the operating segments (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Number of Reportable Segments	2	'	'
Revenue	'	'	'
Product	$62,393	$65,028	$50,322
Service	40,105	35,929	29,181
Total revenue	102,498	100,957	79,503
Cost of revenue	'	'	'
Product	21,714	21,551	17,465
Service	16,595	15,070	14,042
Cost of Goods and Services Sold	38,309	36,621	31,507
Gross Profit [Abstract]	'	'	'
Gross Profit, Goods	40,679	43,477	32,857
Gross Profit, Services	23,510	20,859	15,139
Gross profit	64,189	64,336	47,996
Operating Expenses	74,749	59,440	48,802
Interest income (expense) and other	204	-1,376	-1,388
(Loss) income before income taxes	($10,356)	$3,520	($2,194)

Segments_Summary_of_revenue_by

Segments Summary of revenue by product line (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue from External Customer [Line Items]	'	'	'
Product	$62,393	$65,028	$50,322
Service	40,105	35,929	29,181
Total revenue	102,498	100,957	79,503
Devices	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Product	46,636	47,725	37,088
Software	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Product	15,757	17,303	13,234
Maintenance and support	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Service	31,559	26,237	21,439
Professional services and training	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Service	$8,546	$9,692	$7,742

Segments_Schedule_of_revenue_b

Segments Schedule of revenue by geographic region (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Geographic Areas, Revenues from External Customers [Abstract]	'	'	'
Total revenue	$102,498	$100,957	$79,503
Geographic Areas, Long-Lived Assets [Abstract]	'	'	'
Property and equipment, net	5,365	3,631	2,701
Concentration Risks, Types, No Concentration Percentage [Abstract]	'	'	'
No. of revenue customers with 10% or greater concentration	0	0	0
No of Acct Rec customers with 10% or greater concentration	0	0	'
United States	'	'	'
Geographic Areas, Revenues from External Customers [Abstract]	'	'	'
Total revenue	91,763	90,108	73,719
Geographic Areas, Long-Lived Assets [Abstract]	'	'	'
Property and equipment, net	5,249	3,465	2,646
International	'	'	'
Geographic Areas, Revenues from External Customers [Abstract]	'	'	'
Total revenue	10,735	10,849	5,784
Geographic Areas, Long-Lived Assets [Abstract]	'	'	'
Property and equipment, net	$116	$166	$55

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
United States	($10,812)	$3,205	($2,421)
International	456	315	227
Total (loss) income before income taxes	($10,356)	$3,520	($2,194)

Income_Taxes_Components_of_the

Income Taxes (Components of the provision (benefit) for income taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current	'	'	'
Federal	$0	$7	$25
State	-40	512	156
Foreign	74	38	55
Current Income Tax Expense (Benefit)	34	557	236
Deferred	'	'	'
Federal	60	60	60
State	4	10	9
Foreign	11	0	-20
Deferred Income Tax Expense (Benefit)	75	70	49
Total income tax provision	$109	$627	$285

Income_Taxes_Reconciliation_of

Income Taxes (Reconciliation of the provision for income taxes at the statutory rate to the company's provision for income tax) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
U.S. federal (tax benefit) provision at statutory rate	($3,567)	$1,197	($746)
State (tax benefit) income taxes, net of federal benefit	-338	151	109
Foreign income taxes at rates other than the US rate	-28	-10	-72
Nondeductible Share-based Compensation Cost	549	397	340
Change in valuation allowance	3,911	-1,494	546
Non-deductible warrant expense	0	625	334
Research and development credits	527	220	290
Other	109	-19	64
Total income tax provision	$109	$627	$285
Effective Income Tax Rate, Percent [Abstract]	'	'	'
Effective tax rate	-1.10%	17.80%	-13.00%

Income_Taxes_Deferred_tax_asse

Income Taxes (Deferred tax assets) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]	'	'	'	'
Net operating loss carryforward	$11,873,000	$14,270,000	'	'
Research and development credits	2,809,000	2,637,000	'	'
Deferred Tax Assets, Property, Plant and Equipment	288,000	84,000	'	'
Reserves and accruals	6,060,000	4,502,000	'	'
Total deferred tax assets	21,030,000	21,493,000	'	'
Valuation allowance	-21,030,000	-21,193,000	-22,687,000	-21,588,000
Net deferred tax assets	0	300,000	'	'
Deferred tax liabilities	-216,000	-451,000	'	'
Net deferred tax liabilities	-216,000	-151,000	'	'
Deferred tax assets decrease	$200,000	$1,500,000	'	'

Income_Taxes_Tax_carry_forward

Income Taxes (Tax carry forwards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Tax Credit Carryforward [Line Items]	'	'
Research and development credits	$2,809,000	$2,637,000
Deferred tax assets decrease	200,000	1,500,000
Federal | Federal R&D tax credits carryforwards [Member]	'	'
Tax Credit Carryforward [Line Items]	'	'
Research and development credits	1,700,000	'
State | State R&D tax credits carryforwards [Member]	'	'
Tax Credit Carryforward [Line Items]	'	'
Research and development credits	$2,500,000	'

Income_Taxes_Income_Taxes_Oper

Income Taxes Income Taxes (Operating Loss Carryovers) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]	'
Document Period End Date	31-Dec-13
Federal	'
Operating Loss Carryforwards [Line Items]	'
Operating Loss Carryforwards	49.6
State	'
Operating Loss Carryforwards [Line Items]	'
Operating Loss Carryforwards	37.5
Excess Stock Option Deductions [Member] | Federal	'
Operating Loss Carryforwards [Line Items]	'
Operating Loss Carryforwards	27.2

Income_Taxes_income_Taxes_DTA_

Income Taxes (income Taxes) DTA Valuation Allowance Rollforward (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes (DTA Valuation Allowance Rollforward) [Abstract]	'	'	'
Balance at the beginning of the period	$21,193	$22,687	$21,588
Net operating loss utilization	-2,397	-3,505	-884
R&D tax credit (decrease) increase	172	272	383
Depreciation and amortization increase (decrease)	204	29	-309
Reserves and accruals increase	1,558	1,273	1,581
Deferred tax assets decrease	300	437	328
Balance at the end of the period	$21,030	$21,193	$22,687

Income_Taxes_Changes_in_unreco

Income Taxes (Changes in unrecognized tax benefits) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]	'	'
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$26,000	$0
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'
Gross amount of unrecognized tax benefits as of the beginning of the period	1,079,000	908,000
Increases related to prior year tax provisions	30,000	7,000
Decreases related to prior year tax provisions	-239,000	0
Increases related to current year tax provisions	222,000	164,000
Gross amount of unrecognized tax benefits as of the end of the period	$1,092,000	$1,079,000

Income_Taxes_NonUS_Subsidiarie

Income Taxes (Non-U.S. Subsidiaries' Undistributed Earnings) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]	'
Undistributed Earnings of Foreign Subsidiaries	$0.90

Subsequent_Events_Subsequent_E

Subsequent Events Subsequent Event mVisum acquisition (Details) (mVisum asset purchase [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
mVisum asset purchase [Member]	'
Business Acquisition [Line Items]	'
Subsequent Event, Date	13-Jan-14
Payments to Acquire Businesses, Gross	$3.50