Vocera Communications (VCRA) 10-Q 6 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 04, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	VOCERA COMMUNICATIONS, INC.
Entity Central Index Key	1,129,260
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		26,122,394

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 10,002	$ 22,615
Short-term investments	106,735	93,646
Accounts receivable, net of allowance	14,519	18,008
Other receivables	1,151	694
Inventories	1,747	3,462
Prepaid expenses and other current assets	2,114	2,017
Total current assets	136,268	140,442
Property and equipment, net	4,455	5,122
Intangible assets, net	2,811	3,171
Goodwill	9,988	9,988
Other long-term assets	1,077	905
Total assets	154,599	159,628
Current liabilities
Accounts payable	2,743	1,913
Accrued payroll and other current liabilities	10,046	10,863
Deferred revenue, current	27,398	28,474
Total current liabilities	40,187	41,250
Deferred revenue, long-term	6,501	6,974
Other long-term liabilities	1,946	1,692
Total liabilities	$ 48,634	$ 49,916
Commitments and contingencies (Note 7)
Stockholders' equity
Preferred stock, $0.0003 par value - 5,000,000 shares authorized as of June 30, 2015 and December 31, 2014; zero shares issued and outstanding	$ 0	$ 0
Common stock, $0.0003 par value - 100,000,000 shares authorized as of June 30, 2015 and December 31, 2014; 26,026,221 and 25,644,010 shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	8	8
Additional paid-in capital	208,390	202,515
Accumulated other comprehensive loss	(45)	(81)
Accumulated deficit	(102,388)	(92,730)
Total stockholders’ equity	105,965	109,712
Total liabilities and stockholders’ equity	$ 154,599	$ 159,628

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Paranthetical) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Liabilities and stockholders' equity
Common stock par value	$ 0.0003	$ 0.0003
Common stock shares authorized	100,000,000	100,000,000
Common stock shares issued	26,026,221	25,644,010
Common stock shares outstanding	26,026,221	25,644,010
Preferred Stock
Liabilities and stockholders' equity
Preferred stock par value	$ 0.0003	$ 0.0003
Preferred stock shares authorized	5,000,000	5,000,000
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue
Product	$ 13,320	$ 11,850	$ 25,782	$ 26,039
Service	12,129	11,169	23,485	21,656
Total revenue	25,449	23,019	49,267	47,695
Cost of revenue
Product	4,723	4,421	9,155	9,411
Service	4,914	4,528	9,765	9,342
Total cost of revenue	9,637	8,949	18,920	18,753
Gross profit	15,812	14,070	30,347	28,942
Operating expenses
Research and development	4,242	4,362	8,725	8,428
Sales and marketing	12,102	12,614	22,516	25,357
General and administrative	4,568	4,156	8,568	8,553
Total operating expenses	20,912	21,132	39,809	42,338
Loss from operations	(5,100)	(7,062)	(9,462)	(13,396)
Interest income	117	98	227	185
Other expense, net	(33)	19	(165)	(46)
Loss before income taxes	(5,016)	(6,945)	(9,400)	(13,257)
Provision for income taxes	(155)	(63)	(258)	(140)
Net loss	$ (5,171)	$ (7,008)	$ (9,658)	$ (13,397)
Net loss per share
Basic and Diluted	$ (0.20)	$ (0.28)	$ (0.38)	$ (0.53)
Weighted average shares used to compute net loss per share
Basic and Diluted	25,832	25,246	25,749	25,147

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,171)	$ (7,008)	$ (9,658)	$ (13,397)
Other comprehensive loss, net:
Change in unrealized loss on investments, net of tax	(17)	(1)	36	(24)
Comprehensive loss	$ (5,188)	$ (7,009)	$ (9,622)	$ (13,421)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Cash Flows [Abstract]
Other Operating Activities, Cash Flow Statement	$ 461	$ 90
Cash flows from operating activities
Net loss	9,658	13,397
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,654	1,494
Inventory provision	99	51
Change in lease-related performance liabilities	(490)	(244)
Stock-based compensation expense	5,338	5,376
Changes in operating assets and liabilities:
Accounts receivable	3,030	4,255
Other receivables	(351)	(178)
Inventories	1,617	1,200
Prepaid expenses and other assets	(309)	(508)
Accounts payable	651	(573)
Accrued payroll and other liabilities	(700)	(553)
Deferred revenue	(1,550)	(1,106)
Net cash used in operating activities	(208)	(4,093)
Cash flows from investing activities
Purchase of property and equipment	(385)	(723)
Business acquisitions, net of cash acquired	0	(3,500)
Purchase of short-term investments	(68,203)	(72,912)
Maturities of short-term investments	55,148	56,797
Proceeds from Sale of Available-for-sale Securities	0	(446)
Changes in Restricted Cash	40	0
Net cash used in investing activities	(13,400)	(19,892)
Cash flows from financing activities
Cash from lease-related performance obligations	609	307
Payment for repurchase of early exercised options	0	(11)
Proceeds from issuance of common stock from the employee stock purchase plan	653	945
Proceeds from exercise of stock options	614	793
Tax withholdings paid on behalf of employees for net share settlement	(881)	(740)
Net cash provided by financing activities	995	1,294
Net decrease in cash and cash equivalents	(12,613)	(22,691)
Cash and cash equivalents at beginning of period	22,615	39,652
Cash and cash equivalents at end of period	10,002
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment in accounts payable and accrued liabilities	$ 362	$ 51

The Company and Summary of Sign

The Company and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
The Company and Summary of Significant Accounting Policies	The Company and Summary of Significant Accounting Policies Organization and Business Vocera Communications, Inc. (the “Company” or "Vocera") 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 United States and internationally. The significant majority of the Company's business is currently generated from sales of its solutions in the healthcare market to help its customers improve patient safety and experience, and increase operational efficiency. As of June 30, 2015 the Company's solutions have been installed in more than 1,300 facilities 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. Other software applications help improve care coordination, patient safety, and patient satisfaction. Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X of the U.S. Securities and Exchange Commission, and include the accounts of Vocera and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these unaudited interim condensed consolidated financial statements should be read in conjunction with the annual audited consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2014 . The year-end condensed balance sheet data was derived from the Company's audited financial statements, but does not include all disclosures required by U.S. GAAP. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s interim consolidated financial information. The results for the quarter presented are not necessarily indicative of the results to be expected for the year ending December 31, 2015 or for any other interim period or any other future year. Use of Estimates The preparation of the accompanying unaudited condensed consolidated financial statements in conformity with U.S. 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, useful lives assigned to long-lived assets, excess and obsolete inventory charges, warranty 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. Revenue Recognition The Company derives revenue from the sales of communication badges, perpetual software licenses for software that is essential to the functionality of the communication badges, smartphones, 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 and certain hosted software subscriptions. The Company's revenue recognition policy has not changed from that described in its Annual Report on Form 10-K for the year ended December 31, 2014 . Transfer of sales-type leases to third-parties 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 six months ended June 30, 2015 and 2014 , the Company transferred $1.1 million and $0.5 million , respectively, of lease receivables in non-recourse sales to third-party financial companies, with immaterial net gains (losses). For the six months ended June 30, 2015 and 2014 , the Company recorded $0.6 million and $0.3 million , respectively, of financing liabilities for future performance of executory service obligations. For lease receivables retained as of June 30, 2015 and December 31, 2014 , the Company recorded $1.6 million and $0.9 million of net investment in sales-type leases, respectively, equivalent to the minimum lease payments less the unearned interest portion. Recent Accounting Pronouncements In May 2014, the FASB together with the International Accounting Standards Board issued converged guidance for revenue recognition that will replace most existing guidance, eliminate industry-specific guidance and provide a unified model for determining how and when revenue from contracts with customers should be recognized. Under the new guidance, an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard will also introduce additional disclosures, changes in asset and liability accounting, and changes in gain/loss recognition for asset transfers unrelated to customer transactions. In July 2015 the FASB affirmed a one-year deferral of the effective date of the new revenue standard. The Company’s effective date for this standard will be the first quarter of 2018. Early adoption is permitted but not before the original effective date of annual periods after December 15, 2016. Two methods of transition are provided: a full retrospective approach, with certain practical expedients allowed, and a cumulative effect method, with balance sheet adjustment as of January 1, 2018. The Company is evaluating the effect the new standard will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the future effect of the standard on its financial position or results of operations.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s cash, cash equivalents and short-term investments are carried at their fair values with any differences from their amortized cost recorded in equity as unrealized gains (losses) on marketable securities. 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 six months ended June 30, 2015 , 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 Company does not have any financial instruments which are valued using Level 3 inputs. The Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of June 30, 2015 and December 31, 2014 , are summarized as follows (in thousands): June 30, 2015 December 31, 2014 Level 1 Level 2 Total Level 1 Level 2 Total Assets Money market funds $ 885 $ — $ 885 $ 7,795 $ — $ 7,795 Commercial paper — 200 200 — 3,225 3,225 U.S. government agency securities — 14,217 14,217 — 5,955 5,955 U.S. Treasury securities — 3,020 3,020 — 4,043 4,043 Municipal debt securities — — — 3,924 3,924 Corporate debt securities — 89,400 89,400 — 82,517 82,517 Total assets measured at fair value $ 885 $ 106,837 $ 107,722 $ 7,795 $ 99,664 $ 107,459 The Company had no liabilities as of June 30, 2015 and December 31, 2014 that were measured at fair value on a recurring basis.

Cash, Cash Equivalents and Shor

Cash, Cash Equivalents and Short-term Investments	6 Months Ended
	Jun. 30, 2015
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents, and Short-term Investments	Cash, Cash Equivalents and Short-Term Investments The following tables present current and prior-year-end balances for cash, cash equivalents and short-term investments (in thousands): As of June 30, 2015 Amortized Cost Unrealized Gains Unrealized Losses Fair value Cash and cash equivalents: Demand deposits and other cash $ 9,015 $ — $ — $ 9,015 Money market funds 885 — — 885 Corporate debt securities 102 — — 102 Total cash and cash equivalents 10,002 — — 10,002 Short-Term Investments: Commercial paper 200 — — 200 U.S. government agency securities 14,211 7 (1 ) 14,217 U.S. Treasury securities 3,017 3 — 3,020 Corporate debt securities 89,352 8 (62 ) 89,298 Total short-term investments 106,780 18 (63 ) 106,735 Total cash, cash equivalents and short-term investments $ 116,782 $ 18 $ (63 ) $ 116,737 As of December 31, 2014 Amortized Cost Unrealized Gains Unrealized Losses Fair value Cash and cash equivalents: Demand deposits and other cash $ 8,802 $ — $ — $ 8,802 Money market funds 7,795 — — 7,795 Commercial paper 1,365 — — 1,365 U.S. government agency securities 100 — — 100 Corporate debt securities 4,553 — — 4,553 Total cash and cash equivalents 22,615 — — 22,615 Short-Term Investments: Commercial paper 1,860 — — 1,860 U.S. government agency securities 5,856 1 (2 ) 5,855 U.S. Treasury securities 4,042 1 — 4,043 Municipal debt securities 3,922 2 — 3,924 Corporate debt securities 78,044 5 (85 ) 77,964 Total short-term investments 93,724 9 (87 ) 93,646 Total cash, cash equivalents and short-term investments $ 116,339 $ 9 $ (87 ) $ 116,261 The Company has determined that the unrealized losses on its short-term investments as of June 30, 2015 and December 31, 2014 do not constitute an "other than temporary impairment." The unrealized losses for the short-term investments 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 eight 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 June 30, 2015 Cash and cash equivalents (1) $ 10,002 $ — $ 10,002 Short-term investments 90,013 16,722 106,735 Cash, cash equivalents and short-term investments $ 100,015 $ 16,722 $ 116,737 Balances as of December 31, 2014 Cash and cash equivalents (1) $ 22,615 $ — $ 22,615 Short-term investments 76,917 16,729 93,646 Cash, cash equivalents and short-term investments $ 99,532 $ 16,729 $ 116,261 (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 zero and $0.1 million as of June 30, 2015 and December 31, 2014 , respectively, which is classified within prepaid expenses and other current assets on the balance sheet.

Net Loss Per Share

Net Loss Per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Numerator: Net loss $ (5,171 ) $ (7,008 ) $ (9,658 ) $ (13,397 ) Denominator: Weighted-average shares used to compute net loss per common share - basic and diluted 25,832 25,246 25,749 25,147 Net loss per share Basic and diluted $ (0.20 ) $ (0.28 ) $ (0.38 ) $ (0.53 ) The following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive: Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Options to purchase common stock, including ESPP 3,438 3,692 3,439 3,499 Common stock subject to repurchase — 8 — 7 Warrants to purchase common stock 44 44 44 44 Restricted stock units 1,514 950 1,289 876

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill As of June 30, 2015 and December 31, 2014 , the Company had $10.0 million and $10.0 million of goodwill, respectively. As of June 30, 2015 , there were no changes in circumstances indicating that the carrying values of goodwill or acquired intangibles may not be recoverable. Intangible Assets Acquisition-related intangible assets are amortized either straight-line, or over the life of the assets on a basis that resembles the economic benefit of the assets. This yields amortization in the latter case that is higher in earlier periods of the useful life. The estimated useful lives and carrying value of acquired intangible assets are as follows: June 30, 2015 December 31, 2014 (in thousands) Range of Useful Life (years) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology 4 to 7 $ 2,710 $ 1,854 $ 856 $ 2,710 $ 1,693 $ 1,017 Customer relationships 7 to 9 2,520 1,829 691 2,520 1,722 798 Non-compete agreements 2 to 4 460 175 285 460 91 369 Trademarks and trade names 4 to 7 110 71 39 110 63 47 Intangible assets - finite life 5,800 3,929 1,871 5,800 3,569 2,231 In-process research and development n/a 940 — 940 940 — 940 Intangible assets, net book value $ 6,740 $ 3,929 $ 2,811 $ 6,740 $ 3,569 $ 3,171 Amortization expense was $0.2 million and $0.2 million for the three months ended June 30, 2015 and 2014 , respectively. Amortization expense was $0.4 million and $0.4 million for the six months ended June 30, 2015 and 2014 Amortization of acquired intangible assets is reflected in the cost of revenue or operating expenses, depending on the nature of the intangible. The estimated future amortization of existing acquired intangible assets as of June 30, 2015 , excluding in-process R&D, was as follows: (in thousands) Future amortization 2015 (six months remaining) 367 2016 562 2017 394 2018 275 2019 229 Thereafter 44 Future amortization expense $ 1,871

Balance Sheet Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2015
Balance Sheet Components [Abstract]
Balance Sheet Components	Balance Sheet Components Inventories (in thousands) June 30, December 31, Raw materials $ 408 $ 759 Finished goods 1,339 2,703 Total inventories $ 1,747 $ 3,462 Property and equipment, net (in thousands) June 30, December 31, Computer equipment and software $ 9,257 $ 8,772 Furniture, fixtures and equipment 977 962 Leasehold improvements 2,433 2,298 Manufacturing tools and equipment 3,813 3,795 Construction in process 66 122 Property and equipment, at cost 16,546 15,949 Less: Accumulated depreciation (12,091 ) (10,827 ) Property and equipment, net $ 4,455 $ 5,122 Depreciation and amortization expense was $0.6 million and $0.6 million for the three months ended June 30, 2015 and 2014 , respectively. Depreciation and amortization expense was $1.3 million and $1.1 million for the six months ended June 30, 2015 and 2014 , 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: (in thousands) June 30, December 31, Minimum payments to be received on sales-type leases $ 3,031 $ 1,882 Less: Unearned interest income and executory costs (1,436 ) (962 ) Net investment in sales-type leases 1,595 920 Less: Current portion (959 ) (564 ) Non-current net investment in sales-type leases $ 636 $ 356 There were no allowances for doubtful accounts on these leases as of June 30, 2015 and December 31, 2014 . There is no guaranteed or unguaranteed residual value on the leased equipment. The current and non-current net investments in sales-type leases are reported as components of the consolidated balance sheet captions "other receivables" and "other long-term assets," respectively. The minimum payments expected to be received for future years under sales-type leases as of June 30, 2015 were as follows: (in thousands) Future lease payments 2015 (six months remaining) 684 2016 1,141 2017 694 2018 411 Thereafter 101 Total $ 3,031 Accrued payroll and other current liabilities (in thousands) June 30, December 31, Payroll and related expenses $ 6,553 $ 7,009 Accrued payables 1,022 1,715 Deferred rent, current portion 252 299 Lease financing, current portion 720 645 Product warranty 799 497 Customer prepayments 246 283 Sales and use tax payable 214 293 Other 240 122 Total accrued payroll and other current liabilities $ 10,046 $ 10,863 The changes in the Company's product warranty reserve are as follows: Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Warranty balance at the beginning of the period $ 834 $ 722 $ 497 $ 840 Warranty expense accrued for shipments during the period 93 189 157 487 Changes in estimate related to pre-existing warranties 30 (26 ) 388 25 Warranty settlements made (90 ) (303 ) (175 ) (770 ) Total product warranty $ 867 $ 582 $ 867 $ 582 Less: Long-term portion (68 ) $ — (68 ) $ — Current portion of warranty balance at the end of the period $ 799 $ 582 $ 799 $ 582

Commitments

Commitments	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure	Commitments and Contingencies Non-cancelable Material Commitments The Company is required to purchase unused, non-cancelable, non-returnable raw material inventory that was purchased by its contract manufacturers based on committed finished goods orders from the Company, certain long lead-time raw materials based on the Company’s forecast and current work-in-progress materials. As of June 30, 2015 and December 31, 2014 , approximately $4.9 million and $1.9 million , respectively, of such inventory was purchased and held by the third-party manufacturers which was subject to these purchase guarantees. Leases The Company leases office space for its headquarters and subsidiaries under non-cancelable operating leases, which will expire between December 2015 and March 2022. In April 2015, the Company extended the lease on the San Jose, California headquarters through March 2022. The Company recognizes rent expense on a straight-line basis over the lease period, and has accrued for rent expense incurred but not paid. Facilities rent expense was $0.6 million and $0.5 million for the three months ended June 30, 2015 and 2014 , respectively. Facilities rent expense was $1.1 million and $1.0 million for the six months ended June 30, 2015 and 2014 , respectively. Future minimum lease payments at June 30, 2015 under non-cancelable operating leases are as follows: (in thousands) Operating leases 2015 (remaining six months) $ 887 2016 1,646 2017 1,523 2018 1,460 2019 1,503 2020 1,549 Thereafter 1,997 Total minimum lease payments $ 10,565 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 rights, tortious damage to persons or property or breaches of certain Company obligations relating to confidentiality (e.g., safeguarding protected health information) 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 and 21, 2013, two putative securities class action suits were 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. On November 20, 2013, the court consolidated the actions as In re Vocera Communications, Inc. Securities Litigation and appointed Lead Plaintiffs. Lead Plaintiffs filed their consolidated complaint on September 19, 2014. The consolidated complaint names certain current and former officers and directors and the underwriters for the Company's initial public offering and secondary offering and alleges claims under Sections 11, 12(a)(2) and 15 of the Securities Act and Section 10(b) and 20(a) of the Exchange Act based on allegedly false and materially misleading statements and omissions in the registration statement for the Company's initial public offering and secondary offering and in communications regarding its business and financial results. The suit is purportedly brought on behalf of purchasers of the Company's securities between March 28, 2012 and May 2, 2013, and seeks compensatory damages, rescission, fees and costs, as well as other relief. On November 3, 2014, Defendants moved to dismiss the consolidated complaint. On February 11, 2015, the Court granted Defendants' motion to dismiss the Securities Act claims, but denied the motion as to the Exchange Act claims, allowing the matter to proceed on that basis. On April 27, 2015, Defendants filed answers to the consolidated complaint. 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, the Company 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.

Stock-based Compensation and Aw

Stock-based Compensation and Awards	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation and Award	Stock-based Compensation and Awards Stock Option Activity A summary of the stock option activity for the six months ended June 30, 2015 is presented below: Options outstanding Number of Options Weighted Average Exercise Price Weighted average remaining contractual term Aggregate intrinsic value (in years) (in thousands) Outstanding at December 31, 2014 3,418,624 $ 9.80 6.24 $ 12,167 Options granted 224,290 9.89 Options exercised (105,860 ) 6.80 Options canceled (119,045 ) 17.90 Outstanding at June 30, 2015 3,418,009 $ 9.62 6.17 $ 13,945 At June 30, 2015 , there was $5.8 million of unrecognized net compensation cost related to options which is expected to be recognized over a weighted-average period of 2.62 years . As of June 30, 2015 , there were 1,150,716 shares that remained available for future issuance of options, restricted stock units (“RSUs”) or other equity awards under the 2012 Equity Incentive Plan. The Company uses the Black-Scholes option-pricing model to calculate the fair value of stock options on their grant date. The following assumptions were used for each respective period for employee stock options: Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Expected Term (in years) 5.39 5.41 5.39 5.41 Volatility 41.3% 44% 41.3% - 41.8% 44.0% - 48.2% Risk-free interest rate 1.62% 1.71% 1.62% - 1.63% 1.59% - 1.71% Dividend yield 0% 0% 0% 0% Employee Stock Purchase Plan In March 2012, the Company’s 2012 Employee Stock Purchase Plan (the “ESPP”) was approved. During the six months ended June 30, 2015, employees purchased 78,853 shares of common stock at an average purchase price of $8.279 . During the six months ended June 30, 2014, employees purchased 86,646 shares of common stock at an average purchase price of $10.91 . As of June 30, 2015 , there were 460,242 shares available for future issuance under the ESPP. The following Black-Scholes option-pricing assumptions were used for each respective period for the ESPP: Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Expected Term (in years) 0.50 0.50 0.50 0.50 Volatility 33.6% 35.9% 33.6% - 57.8% 35.9% - 36.0% Risk-free interest rate 0.09% 0.05% 0.07% - 0.09% 0.05% - 0.10% Dividend yield 0% 0% 0% 0% Restricted Stock Units A summary of RSU activity for the six months ended June 30, 2015 is presented below: Restricted Stock Units Number of shares Weighted Average Grant Date Fair Value per Share Outstanding at December 31, 2014 1,062,590 $ 13.79 Granted 792,802 10.54 Vested (277,554 ) 16.57 Forfeited (64,332 ) 12.85 Outstanding at June 30, 2015 1,513,506 $ 11.62 At June 30, 2015 , there was $13.2 million of unrecognized net compensation cost related to RSUs, which is expected to be recognized over a weighted-average period of 2.17 years . Allocation of Stock-Based Compensation Expense The following table presents the stock-based compensation allocation of expense (both for employees and non-employees): Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Cost of revenue $ 341 $ 252 $ 650 $ 538 Research and development 283 239 543 459 Sales and marketing 1,061 1068 2,095 2,035 General and administrative 1,059 1,219 2,050 2,344 Total stock-based compensation $ 2,744 $ 2,778 $ 5,338 $ 5,376

Segments

Segments	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segments	Segments The Company has two operating segments, which are both reportable business segments: (i) Product and (ii) Service, both of which are comprised of Vocera’s and its wholly-owned subsidiaries’ results of operations. The following table presents a summary of the operating segments: Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Revenue Product $ 13,320 $ 11,850 $ 25,782 $ 26,039 Service 12,129 11,169 23,485 21,656 Total revenue 25,449 23,019 49,267 47,695 Cost of Revenue Product 4,723 4,421 9,155 9,411 Service 4,914 4,528 9,765 9,342 Total cost of revenue 9,637 8,949 18,920 18,753 Gross profit Product 8,597 7,429 16,627 16,628 Service 7,215 6,641 13,720 12,314 Total gross profit 15,812 14,070 30,347 28,942 Operating expenses 20,912 21,132 39,809 42,338 Interest (expense) income, net and other 84 117 62 139 Loss before income taxes $ (5,016 ) $ (6,945 ) $ (9,400 ) $ (13,257 )

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a $0.3 million provision and $0.1 million provision for income taxes for the six months ended June 30, 2015 and 2014 , respectively. The provision in both periods was primarily due to taxes on international operations and state income taxes. As of June 30, 2015 , the Company has provided a valuation allowance against certain federal and state deferred tax assets. Management continues to evaluate the realizability of deferred tax assets and the related valuation allowance. If management's assessment of the deferred tax assets or the corresponding valuation allowance were to change, the Company would record the related adjustment to income during the period in which management makes the determination. As of June 30, 2015 , there were no material changes to either the nature or the amounts of the uncertain tax positions previously determined for the year ended December 31, 2014 .

Business Acquisition

Business Acquisition	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Business Combination Disclosure	Business Acquisitions Acquisition of mVisum net assets On January 13, 2014 , the Company acquired certain assets and certain liabilities of mVisum, Inc. (“mVisum”), an innovative provider of alarm management technology solutions for health systems, for $3.5 million in cash. The acquisition enabled the Company to enhance its existing platform with complementary communications solutions for healthcare and other mission-critical environments. The following table presents the fair value of the identifiable assets acquired and liabilities assumed as of the acquisition date: (in thousands) Fair value of net assets acquired Accounts receivable $ 187 Intangibles Developed technology 830 Non-compete agreement 260 Customer relationships 170 Trademarks and trade names 40 Goodwill 2,103 Total assets 3,590 Deferred revenue (90 ) Net assets acquired $ 3,500 The estimated fair values of identifiable intangible assets were primarily determined using discounted cash flow models. The acquired intangible assets are amortized over their estimated useful lives of 4.0 to 7.0 years with a weighted average amortization period of 5.7 years. The excess of the acquisition consideration over the fair values of the underlying net assets acquired was recorded as goodwill. Goodwill is largely attributable to the synergy of mVisum’s proprietary solutions with the Company’s existing customer base, dedicated sales force and cross selling opportunities with the Company’s other solutions. Goodwill is not amortized but instead is tested for impairment at least annually or more frequently if indicators of impairment are present. For federal income tax purposes, the entire purchase consideration, including goodwill, is deductible over fifteen years. The goodwill recorded from the acquisition of mVisum is attributed to the Product reporting unit. The Company incurred $0.2 million of acquisition-related costs that were expensed as incurred during the year ended December 31, 2014. These costs are recorded as general and administrative expenses in the consolidated statement of operations. Additionally, in connection with the acquisition, the Company established a retention bonus plan for former mVisum employees who are now employees of the Company with potential additional compensation over a two-year period of approximately $0.5 million , based on achievement of operating objectives and continued employment. Such amounts are not considered part of the purchase consideration and are being recorded as earned as compensation expense. The acquisition did not result in material contributions to revenue or net loss in the consolidated financial statements since the acquisition date. Additionally, pro forma financial information is not provided for consolidated revenue and net loss as such amounts attributable to mVisum were insignificant.

The Company and Summary of Si18

The Company and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Nature of Operations	Organization and Business Vocera Communications, Inc. (the “Company” or "Vocera") 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 United States and internationally. The significant majority of the Company's business is currently generated from sales of its solutions in the healthcare market to help its customers improve patient safety and experience, and increase operational efficiency. As of June 30, 2015 the Company's solutions have been installed in more than 1,300 facilities 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. Other software applications help improve care coordination, patient safety, and patient satisfaction.
Basis of Presentation	Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X of the U.S. Securities and Exchange Commission, and include the accounts of Vocera and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated. Certain information and disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these unaudited interim condensed consolidated financial statements should be read in conjunction with the annual audited consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2014 . The year-end condensed balance sheet data was derived from the Company's audited financial statements, but does not include all disclosures required by U.S. GAAP. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s interim consolidated financial information. The results for the quarter presented are not necessarily indicative of the results to be expected for the year ending December 31, 2015 or for any other interim period or any other future year.
Use of Estimates	Use of Estimates The preparation of the accompanying unaudited condensed consolidated financial statements in conformity with U.S. 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, useful lives assigned to long-lived assets, excess and obsolete inventory charges, warranty 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.
Revenue Recognition	Revenue Recognition The Company derives revenue from the sales of communication badges, perpetual software licenses for software that is essential to the functionality of the communication badges, smartphones, 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 and certain hosted software subscriptions. The Company's revenue recognition policy has not changed from that described in its Annual Report on Form 10-K for the year ended December 31, 2014 .
Lease, Policy	Transfer of sales-type leases to third-parties 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.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB together with the International Accounting Standards Board issued converged guidance for revenue recognition that will replace most existing guidance, eliminate industry-specific guidance and provide a unified model for determining how and when revenue from contracts with customers should be recognized. Under the new guidance, an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard will also introduce additional disclosures, changes in asset and liability accounting, and changes in gain/loss recognition for asset transfers unrelated to customer transactions. In July 2015 the FASB affirmed a one-year deferral of the effective date of the new revenue standard. The Company’s effective date for this standard will be the first quarter of 2018. Early adoption is permitted but not before the original effective date of annual periods after December 15, 2016. Two methods of transition are provided: a full retrospective approach, with certain practical expedients allowed, and a cumulative effect method, with balance sheet adjustment as of January 1, 2018. The Company is evaluating the effect the new standard will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the future effect of the standard on its financial position or results of operations.
Fair Value of Fin. Instruments, Policy	Fair Value of Financial Instruments The Company’s cash, cash equivalents and short-term investments are carried at their fair values with any differences from their amortized cost recorded in equity as unrealized gains (losses) on marketable securities. 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 six months ended June 30, 2015 , 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 Company does not have any financial instruments which are valued using Level 3 inputs.
Goodwill, Policy	Goodwill As of June 30, 2015 and December 31, 2014 , the Company had $10.0 million and $10.0 million of goodwill, respectively. As of June 30, 2015 , there were no changes in circumstances indicating that the carrying values of goodwill or acquired intangibles may not be recoverable.
Intangible Assets, Policy	Intangible Assets Acquisition-related intangible assets are amortized either straight-line, or over the life of the assets on a basis that resembles the economic benefit of the assets. This yields amortization in the latter case that is higher in earlier periods of the useful life.
Purchase commitments	Non-cancelable Material Commitments The Company is required to purchase unused, non-cancelable, non-returnable raw material inventory that was purchased by its contract manufacturers based on committed finished goods orders from the Company, certain long lead-time raw materials based on the Company’s forecast and current work-in-progress materials. As of June 30, 2015 and December 31, 2014 , approximately $4.9 million and $1.9 million , respectively, of such inventory was purchased and held by the third-party manufacturers which was subject to these purchase guarantees.
Operating leases	Leases The Company leases office space for its headquarters and subsidiaries under non-cancelable operating leases, which will expire between December 2015 and March 2022. In April 2015, the Company extended the lease on the San Jose, California headquarters through March 2022. The Company recognizes rent expense on a straight-line basis over the lease period, and has accrued for rent expense incurred but not paid. Facilities rent expense was $0.6 million and $0.5 million for the three months ended June 30, 2015 and 2014 , respectively.
Segment Reporting, Policy	The Company has two operating segments, which are both reportable business segments: (i) Product and (ii) Service, both of which are comprised of Vocera’s and its wholly-owned subsidiaries’ results of operations.

Fair Value of Financial Insturm

Fair Value of Financial Insturments (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy as of June 30, 2015 and December 31, 2014 , are summarized as follows (in thousands): June 30, 2015 December 31, 2014 Level 1 Level 2 Total Level 1 Level 2 Total Assets Money market funds $ 885 $ — $ 885 $ 7,795 $ — $ 7,795 Commercial paper — 200 200 — 3,225 3,225 U.S. government agency securities — 14,217 14,217 — 5,955 5,955 U.S. Treasury securities — 3,020 3,020 — 4,043 4,043 Municipal debt securities — — — 3,924 3,924 Corporate debt securities — 89,400 89,400 — 82,517 82,517 Total assets measured at fair value $ 885 $ 106,837 $ 107,722 $ 7,795 $ 99,664 $ 107,459

Cash, Cash Equivalents and Sh20

Cash, Cash Equivalents and Short-term Investments (Tables)	6 Months Ended
	Jun. 30, 2015
Cash and Cash Equivalents [Abstract]
Schedule of Cash, Cash Equivalents and Available-For-Sale Investments	The following tables present current and prior-year-end balances for cash, cash equivalents and short-term investments (in thousands): As of June 30, 2015 Amortized Cost Unrealized Gains Unrealized Losses Fair value Cash and cash equivalents: Demand deposits and other cash $ 9,015 $ — $ — $ 9,015 Money market funds 885 — — 885 Corporate debt securities 102 — — 102 Total cash and cash equivalents 10,002 — — 10,002 Short-Term Investments: Commercial paper 200 — — 200 U.S. government agency securities 14,211 7 (1 ) 14,217 U.S. Treasury securities 3,017 3 — 3,020 Corporate debt securities 89,352 8 (62 ) 89,298 Total short-term investments 106,780 18 (63 ) 106,735 Total cash, cash equivalents and short-term investments $ 116,782 $ 18 $ (63 ) $ 116,737 As of December 31, 2014 Amortized Cost Unrealized Gains Unrealized Losses Fair value Cash and cash equivalents: Demand deposits and other cash $ 8,802 $ — $ — $ 8,802 Money market funds 7,795 — — 7,795 Commercial paper 1,365 — — 1,365 U.S. government agency securities 100 — — 100 Corporate debt securities 4,553 — — 4,553 Total cash and cash equivalents 22,615 — — 22,615 Short-Term Investments: Commercial paper 1,860 — — 1,860 U.S. government agency securities 5,856 1 (2 ) 5,855 U.S. Treasury securities 4,042 1 — 4,043 Municipal debt securities 3,922 2 — 3,924 Corporate debt securities 78,044 5 (85 ) 77,964 Total short-term investments 93,724 9 (87 ) 93,646 Total cash, cash equivalents and short-term investments $ 116,339 $ 9 $ (87 ) $ 116,261
Investments Classified by Contractual Maturity Date	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 June 30, 2015 Cash and cash equivalents (1) $ 10,002 $ — $ 10,002 Short-term investments 90,013 16,722 106,735 Cash, cash equivalents and short-term investments $ 100,015 $ 16,722 $ 116,737 Balances as of December 31, 2014 Cash and cash equivalents (1) $ 22,615 $ — $ 22,615 Short-term investments 76,917 16,729 93,646 Cash, cash equivalents and short-term investments $ 99,532 $ 16,729 $ 116,261 (1) Includes demand deposits and other cash, money market funds and other cash equivalent securities, all with 0-90 day maturity at purchase.

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Schedule of the computation of basic and diluted net income (loss) per share	The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts): Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Numerator: Net loss $ (5,171 ) $ (7,008 ) $ (9,658 ) $ (13,397 ) Denominator: Weighted-average shares used to compute net loss per common share - basic and diluted 25,832 25,246 25,749 25,147 Net loss per share Basic and diluted $ (0.20 ) $ (0.28 ) $ (0.38 ) $ (0.53 )
Schedule of antidilutive securities excluded from computation of earnings per share	The following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive: Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Options to purchase common stock, including ESPP 3,438 3,692 3,439 3,499 Common stock subject to repurchase — 8 — 7 Warrants to purchase common stock 44 44 44 44 Restricted stock units 1,514 950 1,289 876

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The estimated useful lives and carrying value of acquired intangible assets are as follows: June 30, 2015 December 31, 2014 (in thousands) Range of Useful Life (years) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology 4 to 7 $ 2,710 $ 1,854 $ 856 $ 2,710 $ 1,693 $ 1,017 Customer relationships 7 to 9 2,520 1,829 691 2,520 1,722 798 Non-compete agreements 2 to 4 460 175 285 460 91 369 Trademarks and trade names 4 to 7 110 71 39 110 63 47 Intangible assets - finite life 5,800 3,929 1,871 5,800 3,569 2,231 In-process research and development n/a 940 — 940 940 — 940 Intangible assets, net book value $ 6,740 $ 3,929 $ 2,811 $ 6,740 $ 3,569 $ 3,171
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Amortization of acquired intangible assets is reflected in the cost of revenue or operating expenses, depending on the nature of the intangible. The estimated future amortization of existing acquired intangible assets as of June 30, 2015 , excluding in-process R&D, was as follows: (in thousands) Future amortization 2015 (six months remaining) 367 2016 562 2017 394 2018 275 2019 229 Thereafter 44 Future amortization expense $ 1,871

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2015
Balance Sheet Components [Abstract]
Inventories	Inventories (in thousands) June 30, December 31, Raw materials $ 408 $ 759 Finished goods 1,339 2,703 Total inventories $ 1,747 $ 3,462
Property and Equipment	Property and equipment, net (in thousands) June 30, December 31, Computer equipment and software $ 9,257 $ 8,772 Furniture, fixtures and equipment 977 962 Leasehold improvements 2,433 2,298 Manufacturing tools and equipment 3,813 3,795 Construction in process 66 122 Property and equipment, at cost 16,546 15,949 Less: Accumulated depreciation (12,091 ) (10,827 ) Property and equipment, net $ 4,455 $ 5,122 Depreciation and amortization expense was $0.6 million and $0.6 million for the three months ended June 30, 2015 and 2014 , respectively. Depreciation and amortization expense was $1.3 million and $1.1 million for the six months ended June 30, 2015 and 2014 , respectively.
Schedule of Components of Leveraged Lease Investments	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: (in thousands) June 30, December 31, Minimum payments to be received on sales-type leases $ 3,031 $ 1,882 Less: Unearned interest income and executory costs (1,436 ) (962 ) Net investment in sales-type leases 1,595 920 Less: Current portion (959 ) (564 ) Non-current net investment in sales-type leases $ 636 $ 356 There were no allowances for doubtful accounts on these leases as of June 30, 2015 and December 31, 2014 . There is no guaranteed or unguaranteed residual value on the leased equipment. The current and non-current net investments in sales-type leases are reported as components of the consolidated balance sheet captions "other receivables" and "other long-term assets," respectively.
Schedule of Future Minimum Lease Payments for Capital Leases	The minimum payments expected to be received for future years under sales-type leases as of June 30, 2015 were as follows: (in thousands) Future lease payments 2015 (six months remaining) 684 2016 1,141 2017 694 2018 411 Thereafter 101 Total $ 3,031
Accrued Liabilities	Accrued payroll and other current liabilities (in thousands) June 30, December 31, Payroll and related expenses $ 6,553 $ 7,009 Accrued payables 1,022 1,715 Deferred rent, current portion 252 299 Lease financing, current portion 720 645 Product warranty 799 497 Customer prepayments 246 283 Sales and use tax payable 214 293 Other 240 122 Total accrued payroll and other current liabilities $ 10,046 $ 10,863
Schedule of Product Warranty Liability	The changes in the Company's product warranty reserve are as follows: Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Warranty balance at the beginning of the period $ 834 $ 722 $ 497 $ 840 Warranty expense accrued for shipments during the period 93 189 157 487 Changes in estimate related to pre-existing warranties 30 (26 ) 388 25 Warranty settlements made (90 ) (303 ) (175 ) (770 ) Total product warranty $ 867 $ 582 $ 867 $ 582 Less: Long-term portion (68 ) $ — (68 ) $ — Current portion of warranty balance at the end of the period $ 799 $ 582 $ 799 $ 582

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum lease payments at June 30, 2015 under non-cancelable operating leases are as follows: (in thousands) Operating leases 2015 (remaining six months) $ 887 2016 1,646 2017 1,523 2018 1,460 2019 1,503 2020 1,549 Thereafter 1,997 Total minimum lease payments $ 10,565

Stock-based Compensation and 25

Stock-based Compensation and Awards (Tables)	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Rollforward of stock option activity	A summary of the stock option activity for the six months ended June 30, 2015 is presented below: Options outstanding Number of Options Weighted Average Exercise Price Weighted average remaining contractual term Aggregate intrinsic value (in years) (in thousands) Outstanding at December 31, 2014 3,418,624 $ 9.80 6.24 $ 12,167 Options granted 224,290 9.89 Options exercised (105,860 ) 6.80 Options canceled (119,045 ) 17.90 Outstanding at June 30, 2015 3,418,009 $ 9.62 6.17 $ 13,945
Stock option valuation assumptions	The following assumptions were used for each respective period for employee stock options: Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Expected Term (in years) 5.39 5.41 5.39 5.41 Volatility 41.3% 44% 41.3% - 41.8% 44.0% - 48.2% Risk-free interest rate 1.62% 1.71% 1.62% - 1.63% 1.59% - 1.71% Dividend yield 0% 0% 0% 0%
Equity B-S-M Valuation Assumptions	The following Black-Scholes option-pricing assumptions were used for each respective period for the ESPP: Three months ended June 30, Six months ended June 30, 2015 2014 2015 2014 Expected Term (in years) 0.50 0.50 0.50 0.50 Volatility 33.6% 35.9% 33.6% - 57.8% 35.9% - 36.0% Risk-free interest rate 0.09% 0.05% 0.07% - 0.09% 0.05% - 0.10% Dividend yield 0% 0% 0% 0%
Rollforward of RSA and RSU activty	A summary of RSU activity for the six months ended June 30, 2015 is presented below: Restricted Stock Units Number of shares Weighted Average Grant Date Fair Value per Share Outstanding at December 31, 2014 1,062,590 $ 13.79 Granted 792,802 10.54 Vested (277,554 ) 16.57 Forfeited (64,332 ) 12.85 Outstanding at June 30, 2015 1,513,506 $ 11.62
Allocation of Recognized Period Costs	The following table presents the stock-based compensation allocation of expense (both for employees and non-employees): Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Cost of revenue $ 341 $ 252 $ 650 $ 538 Research and development 283 239 543 459 Sales and marketing 1,061 1068 2,095 2,035 General and administrative 1,059 1,219 2,050 2,344 Total stock-based compensation $ 2,744 $ 2,778 $ 5,338 $ 5,376

Segments Segments (Tables)

Segments Segments (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segments	The following table presents a summary of the operating segments: Three months ended June 30, Six months ended June 30, (in thousands) 2015 2014 2015 2014 Revenue Product $ 13,320 $ 11,850 $ 25,782 $ 26,039 Service 12,129 11,169 23,485 21,656 Total revenue 25,449 23,019 49,267 47,695 Cost of Revenue Product 4,723 4,421 9,155 9,411 Service 4,914 4,528 9,765 9,342 Total cost of revenue 9,637 8,949 18,920 18,753 Gross profit Product 8,597 7,429 16,627 16,628 Service 7,215 6,641 13,720 12,314 Total gross profit 15,812 14,070 30,347 28,942 Operating expenses 20,912 21,132 39,809 42,338 Interest (expense) income, net and other 84 117 62 139 Loss before income taxes $ (5,016 ) $ (6,945 ) $ (9,400 ) $ (13,257 )

Business Acquisition (Tables)

Business Acquisition (Tables)	6 Months Ended
	Jun. 30, 2015
Net assets of mVisum, Inc.
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table presents the fair value of the identifiable assets acquired and liabilities assumed as of the acquisition date: (in thousands) Fair value of net assets acquired Accounts receivable $ 187 Intangibles Developed technology 830 Non-compete agreement 260 Customer relationships 170 Trademarks and trade names 40 Goodwill 2,103 Total assets 3,590 Deferred revenue (90 ) Net assets acquired $ 3,500

The Company and Summary of Si28

The Company and Summary of Significant Accounting Policies Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accounting Policies [Abstract]
sales type capital leases transfered to banks	$ 1,100	$ 500
Initial financing liability during period incurred for future executory services on transfered leases	600	$ 300
Net Investment in Sales Type Leases	$ 1,595		$ 920

Fair Value of Financial Instr29

Fair Value of Financial Instruments (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	$ 0
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0
Assets, Fair Value Disclosure [Abstract]
Cash and Cash Equivalents, Fair Value Disclosure	10,002,000	$ 22,615,000
AFS Securities, Fair Value Disclosure	106,735,000	93,646,000
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Total assets measured at fair value	107,722,000	107,459,000
Fair Value, Measurements, Recurring | Level 1
Assets, Fair Value Disclosure [Abstract]
Total assets measured at fair value	885,000	7,795,000
Fair Value, Measurements, Recurring | Level 2
Assets, Fair Value Disclosure [Abstract]
Total assets measured at fair value	106,837,000	99,664,000
Fair Value, Measurements, Recurring | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash and Cash Equivalents, Fair Value Disclosure	885,000	7,795,000
Fair Value, Measurements, Recurring | Money market funds | Level 1
Assets, Fair Value Disclosure [Abstract]
Cash and Cash Equivalents, Fair Value Disclosure	885,000	7,795,000
Fair Value, Measurements, Recurring | Money market funds | Level 2
Assets, Fair Value Disclosure [Abstract]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Commercial paper
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	200,000	3,225,000
Fair Value, Measurements, Recurring | Commercial paper | Level 1
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Commercial paper | Level 2
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	200,000	3,225,000
Fair Value, Measurements, Recurring | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	14,217,000	5,955,000
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 1
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | U.S. government agency securities | Level 2
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	14,217,000	5,955,000
Fair Value, Measurements, Recurring | U.S. Treasury securities
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	3,020,000	4,043,000
Fair Value, Measurements, Recurring | U.S. Treasury securities | Level 1
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | U.S. Treasury securities | Level 2
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	3,020,000	4,043,000
Fair Value, Measurements, Recurring | Municipal debt securities
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	0	3,924,000
Fair Value, Measurements, Recurring | Municipal debt securities | Level 1
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	$ 0	0
Fair Value, Measurements, Recurring | Municipal debt securities | Level 2
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure		3,924,000
Fair Value, Measurements, Recurring | Corporate debt securities
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	$ 89,400,000	82,517,000
Fair Value, Measurements, Recurring | Corporate debt securities | Level 1
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Corporate debt securities | Level 2
Assets, Fair Value Disclosure [Abstract]
AFS Securities, Fair Value Disclosure	$ 89,400,000	$ 82,517,000

Schedule of Available for Sale

Schedule of Available for Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of available for sale securities [Line Items]
Restricted cash	$ 0	$ 100
Cash and cash equivalents [Abstract]
Cash and Cash Equivalents, Amortized Cost	10,002	22,615
Cash And Cash Equivalents, Gross Unrealized Gains	0	0
Cash And Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	10,002	22,615
Short-term Investments [Abstract]
AFS Securities, Amortized Cost Basis	106,780	93,724
Available-for-sale Securities, Gross Unrealized Gain1	18	9
Available-for-sale Securities, Gross Unrealized Loss1	(63)	(87)
AFS Securities, Fair Value Disclosure	106,735	93,646
Cash, Cash Equivalents, and Short-term Investments [Abstract]
Cash, Cash Equiv. And S-T Investments, Amortized Cost	116,782	116,339
Cash, Cash Equiv. And S-T Investments, Gross Unrealized Gains	18	9
Cash, Cash Equiv. And S-T Investments, Gross Unrealized Losses	(63)	(87)
Cash, Cash Equiv. And S-T Investments, Fair Value Disclosure	116,737	116,261
Demand deposits and other cash
Cash and cash equivalents [Abstract]
Cash and Cash Equivalents, Amortized Cost	9,015	8,802
Cash And Cash Equivalents, Gross Unrealized Gains	0	0
Cash And Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	9,015	8,802
Money market funds
Cash and cash equivalents [Abstract]
Cash and Cash Equivalents, Amortized Cost	885	7,795
Cash And Cash Equivalents, Gross Unrealized Gains	0	0
Cash And Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	885	7,795
Commercial Paper in CE
Cash and cash equivalents [Abstract]
Cash and Cash Equivalents, Amortized Cost		1,365
Cash And Cash Equivalents, Gross Unrealized Gains		0
Cash And Cash Equivalents, Gross Unrealized Losses		0
Cash and Cash Equivalents, Fair Value Disclosure		1,365
U.S. government agency securities
Cash and cash equivalents [Abstract]
Cash and Cash Equivalents, Amortized Cost		100
Cash And Cash Equivalents, Gross Unrealized Gains		0
Cash And Cash Equivalents, Gross Unrealized Losses		0
Cash and Cash Equivalents, Fair Value Disclosure		100
Corporate Debt Securities
Cash and cash equivalents [Abstract]
Cash and Cash Equivalents, Amortized Cost	102	4,553
Cash And Cash Equivalents, Gross Unrealized Gains	0	0
Cash And Cash Equivalents, Gross Unrealized Losses	0	0
Cash and Cash Equivalents, Fair Value Disclosure	102	4,553
Commercial paper in STI
Short-term Investments [Abstract]
AFS Securities, Amortized Cost Basis	200	1,860
Available-for-sale Securities, Gross Unrealized Gain1	0	0
Available-for-sale Securities, Gross Unrealized Loss1	0	0
AFS Securities, Fair Value Disclosure	200	1,860
U.S. government agency securities
Short-term Investments [Abstract]
AFS Securities, Amortized Cost Basis	14,211	5,856
Available-for-sale Securities, Gross Unrealized Gain1	7	1
Available-for-sale Securities, Gross Unrealized Loss1	(1)	(2)
AFS Securities, Fair Value Disclosure	14,217	5,855
U.S. Treasury securities
Short-term Investments [Abstract]
AFS Securities, Amortized Cost Basis	3,017	4,042
Available-for-sale Securities, Gross Unrealized Gain1	3	1
Available-for-sale Securities, Gross Unrealized Loss1	0	0
AFS Securities, Fair Value Disclosure	3,020	4,043
Municipal debt securities
Short-term Investments [Abstract]
AFS Securities, Amortized Cost Basis		3,922
Available-for-sale Securities, Gross Unrealized Gain1		2
Available-for-sale Securities, Gross Unrealized Loss1		0
AFS Securities, Fair Value Disclosure		3,924
Corporate Debt Securities
Short-term Investments [Abstract]
AFS Securities, Amortized Cost Basis	89,352	78,044
Available-for-sale Securities, Gross Unrealized Gain1	8	5
Available-for-sale Securities, Gross Unrealized Loss1	(62)	(85)
AFS Securities, Fair Value Disclosure	$ 89,298	$ 77,964

Contractual maturities of cash,

Contractual maturities of cash, cash equivalent and short-term investment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents (1)	$ 10,002	$ 22,615
Short-term investments	106,735	93,646
Cash, cash equivalents and short-term investments	116,737	116,261
Maturity up to one year
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents (1)	10,002	22,615
Short-term investments	90,013	76,917
Cash, cash equivalents and short-term investments	100,015	99,532
maturity between 1 and 2 years
Schedule of Available-for-sale Securities [Line Items]
Cash and cash equivalents (1)	0	0
Short-term investments	16,722	16,729
Cash, cash equivalents and short-term investments	$ 16,722	$ 16,729

Schedule of the computation of

Schedule of the computation of basic and diluted net income (loss) per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net loss	$ (5,171)	$ (7,008)	$ (9,658)	$ (13,397)
Denominator:
Weighted Average Number of Shares Outstanding, Basic and Diluted	25,832	25,246	25,749	25,147
Net loss per share
Earnings Per Share, Basic and Diluted	$ (0.20)	$ (0.28)	$ (0.38)	$ (0.53)

Schedule of antidilutive securi

Schedule of antidilutive securities excluded from computation of earnings per share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Options to purchase common stock, including ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,438	3,692	3,439	3,499
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	0	8	0	7
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	44	44	44
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,514	950	1,289	876

Schedule of Finite-Lived Intang

Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,800	$ 5,800
Accumulated Amortization	3,929	3,569
Finite-Lived Intangible Assets, Net	1,871	2,231
Finite-Lived Intangible Assets, Useful Life
Intangible assets, gross	6,740	6,740
Intangible assets, net book value	2,811	3,171
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,710	2,710
Accumulated Amortization	1,854	1,693
Finite-Lived Intangible Assets, Net	856	1,017
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,520	2,520
Accumulated Amortization	1,829	1,722
Finite-Lived Intangible Assets, Net	691	798
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	460	460
Accumulated Amortization	175	91
Finite-Lived Intangible Assets, Net	285	369
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	110	110
Accumulated Amortization	71	63
Finite-Lived Intangible Assets, Net	$ 39	47
Minimum | Developed technology
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	4 years
Minimum | Customer relationships
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	7 years
Minimum | Noncompete Agreements
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	2 years
Minimum | Trademarks and trade names
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	4 years
Maximum | Developed technology
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	7 years
Maximum | Customer relationships
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	9 years
Maximum | Noncompete Agreements
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	4 years
Maximum | Trademarks and trade names
Finite-Lived Intangible Assets, Useful Life
Finite-lived intangible asset, useful life	7 years
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 940	$ 940

Future amortization schedule (D

Future amortization schedule (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Goodwill and intangible assets [Abstract]
Finite-Lived Intangibles, AmortExp, 2015	$ 367
Finite-Lived Intangibles, AmortExp, 2016	562
Finite-Lived Intangibles, AmortExp, 2017	394
Finite-Lived Intangibles, AmortExp, 2018	275
Finite-Lived Intangibles, AmortExp, 2019	229
Finite-Lived Intangibles, AmortExp, after 5th Year	44
Finite-Lived Intangible Assets, Net	$ 1,871	$ 2,231

Goodwill and Intangible Asset36

Goodwill and Intangible Assets Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 9,988		$ 9,988		$ 9,988
Intangibles - period amortization expense [Abstract]
Amortization expense	$ 200	$ 200	$ 400	$ 400

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventory, Net [Abstract]
Raw materials	$ 408	$ 759
Finished goods	1,339	2,703
Total inventories	$ 1,747	$ 3,462

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 16,546		$ 16,546		$ 15,949
Less: Accumulated depreciation	(12,091)		(12,091)		(10,827)
Property and equipment, net	4,455		4,455		5,122
Depreciation, Depletion and Amortization [Abstract]
Depreciation	600	$ 600	1,300	$ 1,100
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	9,257		9,257		8,772
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	977		977		962
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,433		2,433		2,298
Manufacturing tools and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,813		3,813		3,795
Construction in process
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 66		$ 66		$ 122

Investment in Sales Type Leases

Investment in Sales Type Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Capital Leased Assets [Line Items]
Net Investment in Sales Type Leases, Future Minimum Payments-Gross	$ 3,031	$ 1,882
Net Investment in Sales Type Leases, Deferred Income	(1,436)	(962)
Net Investment in Sales Type Leases	1,595	920
Net Investment in Sales Type Leases, Current	(959)	(564)
Net Investment in Sales Type Leases, Noncurrent	$ 636	$ 356
Minimum
Capital Leased Assets [Line Items]
Lessors, Capital Leases, Term of contract	1 year 3 months
Maximum
Capital Leased Assets [Line Items]
Lessors, Capital Leases, Term of contract	4 years

Future payments- sales type lea

Future payments- sales type leases (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Balance Sheet Components [Abstract]
Sales-type Leases, Future Minimum Payments, Remainder of 2015	$ 684
Sales-type Leases, Future Minimum Payments-2016	1,141
Capital Leases, Future Minimum Payments Due in Two Years	694
Sales-type Leases, Future Minimum Payments-2018	411
Capital Leases, Future Minimum Payments Due Thereafter	101
Net Investment in Sales Type Leases, Future Minimum Payments-Gross	$ 3,031	$ 1,882

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accrued Liabilities, Current [Abstract]
Payroll and related expenses	$ 6,553	$ 7,009
Accrued payables	1,022	1,715
Deferred Rent Credit, Current	252	299
Lease financing, current portion	720	645
Product warranty	799	497
Customer Refund Liability, Current	246	283
Sales and use tax payable	214	293
Other	240	122
Total accrued payroll and other current liabilities	$ 10,046	$ 10,863

Schedule of Product Liability (

Schedule of Product Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Product warranty accrual, at the beginning of the period	$ 834	$ 722	$ 497	$ 840
Warranty expenses accrued	93	189	157	487
Product Warranty Accrual, Preexisting, Increase (Decrease)	30	(26)	388	25
Warranty settlements made	(90)	(303)	(175)	(770)
Product warranty accrual, at the end of period	799	582	799	582
Product Warranty Accrual	867	582	867	582
Product Warranty Accrual, Noncurrent	$ (68)	$ 0	$ (68)	$ 0

Schedule of Future Minimum Rent

Schedule of Future Minimum Rental Payments for Operating Leases (Details) $ in Thousands	Jun. 30, 2015USD ($)
Operating Leases, Future Minimum Payments Due, by FY
Remainder of 2015	$ 887
2,016	1,646
2,017	1,523
2,018	1,460
Operating Leases, Future Minimum Payments, Due in Four Years	1,503
Operating Leases, Future Minimum Payments, Due in Five Years	1,549
Operating Leases, Future Minimum Payments, Due Thereafter	1,997
Total minimum lease payments	$ 10,565

Commitments Narrative (Details)

Commitments Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Unrecorded Unconditional Purchase Obligation [Line Items]
Operating Leases, Rent Expense, Net	$ 0.6	$ 0.5	$ 1.1	$ 1
Inventories
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation	$ 4.9		$ 4.9		$ 1.9

Stock Option Activity (Details)

Stock Option Activity (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Number of Options (in shares):
Beginning balance	3,418,624
Options granted	224,290
Options exercised	(105,860)
Options canceled	(119,045)
Ending balance	3,418,009	3,418,624
Weighted Average Exercise Price (in dollars per share):
Beginning balance	$ 9.80
Options granted	9.89
Options exercised	6.80
Options canceled	17.90
Ending balance	$ 9.62	$ 9.80
Wtd avg remaining term, Outstanding	6 years 2 months 1 day	6 years 2 months 27 days
Aggregate intrinsic value, Outstanding	$ 13,945	$ 12,167

Summary of Equity B-S-M Assumpt

Summary of Equity B-S-M Assumptiuons (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity Option
Equity B-S-M Fair Value Assumptions
Expected Term (in years)	5 years 4 months 21 days	5 years 4 months 27 days	5 years 4 months 21 days	5 years 4 months 27 days
Volatility	41.30%	44.00%
Interest Rate	1.62%	1.71%
Dividend yield	0.00%	0.00%	0.00%	0.00%
Equity Option | Minimum
Equity B-S-M Fair Value Assumptions
Expected Term (in years)
Volatility			41.30%	44.00%
Interest Rate			1.62%	1.59%
Equity Option | Maximum
Equity B-S-M Fair Value Assumptions
Expected Term (in years)
Volatility			41.80%	48.20%
Interest Rate			1.63%	1.71%
2012 Employee Stock Purchase Plan | ESPP
Equity B-S-M Fair Value Assumptions
Expected Term (in years)	6 months	6 months
Volatility	33.60%	35.90%
Interest Rate	0.09%	0.05%
Dividend yield	0.00%	0.00%	0.00%	0.00%
2012 Employee Stock Purchase Plan | ESPP | Minimum
Equity B-S-M Fair Value Assumptions
Expected Term (in years)
Volatility			33.60%	35.90%
Interest Rate			0.07%	0.05%
2012 Employee Stock Purchase Plan | ESPP | Maximum
Equity B-S-M Fair Value Assumptions
Expected Term (in years)
Volatility			57.80%	36.00%
Interest Rate			0.09%	0.10%

Summary of Restricted Stock Act

Summary of Restricted Stock Activity (Details) - 6 months ended Jun. 30, 2015 - Restricted Stock Units - $ / shares	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Comp-other than options - Period for Recognition- Comp cost not yet rocognized	2 years 2 months 1 day
Number of Shares:
Beginning balance	1,062,590
Granted	792,802
Vested	(277,554)
Forfeited	(64,332)
Ending balance	1,513,506
Weighted Average Grant Date Fair Value per Share (in dollars per share):
Beginning balance	$ 13.79
Granted	10.54
Vested	16.57
Forfeited	12.85
Ending balance	$ 11.62

Share-based Compensaton Allocat

Share-based Compensaton Allocated to Expense Captions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2,744	$ 2,778	$ 5,338	$ 5,376
Cost of Sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	341	252	650	538
Research and Development Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	283	239	543	459
Selling and Marketing Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,061	1,068	2,095	2,035
General and Administrative Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,059	$ 1,219	$ 2,050	$ 2,344
Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%	0.00%	0.00%	0.00%

Narrative (Details)

Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	78,853	86,646
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Unamortized Compensation Cost, Stock Options	$ 5.8
Uamortized Compensation Cost Not yet Recognized, Period Remaining, Options	2 years 7 months 13 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 13.2
Stock Comp-other than options - Period for Recognition- Comp cost not yet rocognized	2 years 2 months 1 day
2012 Stock Option Plan | Stock options and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Available for Grant	1,150,716
2012 Employee Stock Purchase Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Available for Grant	460,242
ESPP plan details [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased	$ 8.279	$ 10.91

Segments Operating Segments (De

Segments Operating Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)Segments	Jun. 30, 2014USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segments			2
Revenue
Product	$ 13,320	$ 11,850	$ 25,782	$ 26,039
Service	12,129	11,169	23,485	21,656
Total revenue	25,449	23,019	49,267	47,695
Cost of revenue
Product	4,723	4,421	9,155	9,411
Service	4,914	4,528	9,765	9,342
Cost of Goods and Services Sold	9,637	8,949	18,920	18,753
Gross profit
Product	8,597	7,429	16,627	16,628
Service	7,215	6,641	13,720	12,314
Total gross profit	15,812	14,070	30,347	28,942
Calculation of pretax profit (loss) [Abstract]
Operating expenses	20,912	21,132	39,809	42,338
Interest (expense) income, net and other	84	117	62	139
Loss before income taxes	$ (5,016)	$ (6,945)	$ (9,400)	$ (13,257)

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 155	$ 63	$ 258	$ 140

Business Acquisition - PPA (Det

Business Acquisition - PPA (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jan. 13, 2014
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill	$ 9,988	$ 9,988
Net assets of mVisum, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Business Combination, Receivables acquired			$ 187
Goodwill			2,103
Total assets acquired including Goodwill			3,590
Business Combination, Deferred Revenue acquired			(90)
Business Combination, Net assets acquired			3,500
Net assets of mVisum, Inc. | Developed technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Business Combination, Finite-Lived Intangibles acquired			830
Net assets of mVisum, Inc. | Noncompete Agreements
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Business Combination, Finite-Lived Intangibles acquired			260
Net assets of mVisum, Inc. | Customer relationships
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Business Combination, Finite-Lived Intangibles acquired			170
Net assets of mVisum, Inc. | Trademarks and trade names
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Business Combination, Finite-Lived Intangibles acquired			$ 40

Business Acquisition Narrative

Business Acquisition Narrative (Details) - USD ($) $ in Millions	Jan. 13, 2014	Jun. 30, 2015
Net assets of mVisum, Inc.
Business Acquisition [Line Items]
Payments to acquire businesses	$ 3.5
Weighted average useful life	5 years 8 months 1 day
Acquisition related costs	$ 0.2
Future bonus compensation	$ 0.5
Minimum | Net assets of mVisum, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	4 years
Maximum | Net assets of mVisum, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	7 years
Noncompete Agreements | Minimum
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		2 years
Noncompete Agreements | Maximum
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		4 years