Control4 (CTRL) 10-Q 4 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 24, 2014
Document and Entity Information	'	'
Entity Registrant Name	'Control4 Corp	'
Entity Central Index Key	'0001259515	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	23,816,737
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$18,413	$84,546
Short-term investments	47,573	'
Accounts receivable, net	16,692	15,064
Inventories	15,990	15,312
Prepaid expenses and other current assets	2,187	1,773
Total current assets	100,855	116,695
Property and equipment, net	3,941	3,943
Long-term investments	22,543	'
Intangible assets, net	732	928
Other assets	1,288	1,120
Total assets	129,359	122,686
Current liabilities:	'	'
Accounts payable	12,517	13,314
Accrued liabilities	6,399	6,821
Deferred revenue	729	644
Current portion of notes payable	1,089	1,138
Total current liabilities	20,734	21,917
Notes payable	1,322	1,828
Other long-term liabilities	434	467
Total liabilities	22,490	24,212
Commitments and contingencies	'	'
Stockholders' equity:	'	'
Common stock, $0.0001 par value; 500,000,000 shares authorized; 22,785,104 and 23,790,827 shares issued and outstanding at December 31, 2013 and June 30, 2014 (unaudited), respectively	2	2
Additional paid-in capital	207,450	200,545
Accumulated deficit	-100,612	-102,084
Accumulated other comprehensive income	29	11
Total stockholders' equity	106,869	98,474
Total liabilities and stockholders' equity	$129,359	$122,686

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
CONDENSED CONSOLIDATED BALANCE SHEETS	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	23,790,827	22,785,104
Common stock, shares outstanding	23,790,827	22,785,104

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS	'	'	'	'
Revenue	$36,661	$32,543	$68,516	$59,114
Cost of revenue	17,694	15,987	33,313	29,537
Cost of revenue - inventory purchase commitment	'	-180	'	-180
Gross margin	18,967	16,736	35,203	29,757
Operating expenses:	'	'	'	'
Research and development	7,097	6,195	13,872	12,261
Sales and marketing	6,364	5,396	12,665	11,001
General and administrative	3,440	2,948	7,128	5,776
Litigation settlement	35	240	35	240
Total operating expenses	16,936	14,779	33,700	29,278
Income from operations	2,031	1,957	1,503	479
Other income (expense):	'	'	'	'
Interest, net	20	-132	1	-207
Other income (expense), net	63	-767	71	-741
Total other income (expense)	83	-899	72	-948
Income (loss) before income taxes	2,114	1,058	1,575	-469
Income tax expense	-103	-85	-103	-29
Net income (loss)	$2,011	$973	$1,472	($498)
Net income (loss) per common share:	'	'	'	'
Basic (in dollars per share)	$0.08	$0.39	$0.06	($0.20)
Diluted (in dollars per share)	$0.08	$0.05	$0.06	($0.20)
Weighted-average number of shares:	'	'	'	'
Basic (in shares)	23,715	2,511	23,417	2,507
Diluted (in shares)	25,671	20,358	25,709	2,507

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)	'	'	'	'
Net income (loss)	$2,011	$973	$1,472	($498)
Other comprehensive income (loss):	'	'	'	'
Foreign currency translation adjustment	16	-1	17	-6
Net unrealized gains on available-for-sale investments	34	'	1	'
Total other comprehensive income (loss)	50	-1	18	-6
Comprehensive income (loss)	$2,061	$972	$1,490	($504)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities	'	'
Net income (loss)	$1,472	($498)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'	'
Depreciation expense	1,245	1,084
Amortization of intangible assets	196	135
Provision for doubtful accounts	163	101
Gain on inventory purchase commitment	'	-180
Stock-based compensation	2,655	1,708
Excess tax benefit from exercise of options for common stock	-9	'
Warrant liability expense	'	737
Changes in assets and liabilities:	'	'
Accounts receivable	-1,734	-2,494
Inventories	-597	-251
Prepaid expenses and other current assets	-403	208
Other assets	-168	-2,035
Accounts payable	-932	1,288
Accrued liabilities	-431	-394
Deferred revenue	85	147
Other long-term liabilities	-33	1,119
Net cash provided by operating activities	1,509	675
Investing activities	'	'
Purchases of available-for-sale investments	-73,259	'
Proceeds from sales of available-for-sale investments	1,043	'
Proceeds from maturities of available-for-sale investments	2,100	'
Purchases of property and equipment	-1,230	-1,972
Business acquisition	'	-88
Net cash used in investing activities	-71,346	-2,060
Financing activities	'	'
Proceeds from exercise of options for common stock	4,241	149
Excess tax benefit from exercise of options for common stock	9	'
Proceeds from notes payable	'	1,145
Repayment of notes payable	-555	-514
Net cash provided by financing activities	3,695	780
Effect of exchange rate changes on cash and cash equivalents	9	-25
Net decrease in cash and cash equivalents	-66,133	-630
Cash and cash equivalents at beginning of period	84,546	18,695
Cash and cash equivalents at end of period	18,413	18,065
Supplemental disclosure of cash flow information	'	'
Cash paid for interest	78	167
Cash paid for taxes	100	61
Supplemental schedule of non-cash investing and financing activities	'	'
Options for common stock granted in connection with a business acquisition	'	$174

Description_of_Business_and_Su

Description of Business and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Description of Business and Summary of Significant Accounting Policies	'
Description of Business and Summary of Significant Accounting Policies	'
	1. Description of Business and Summary of Significant Accounting Policies
	Control4 Corporation (‘‘Control4’’ or the ‘‘Company’’) is a leading provider of automation and control solutions for the connected home. The Company unlocks the potential of connected devices, making entertainment systems easier to use, homes more comfortable, appliances more energy efficient, and families more secure. The Company was incorporated in the state of Delaware on March 27, 2003.
	Unaudited Interim Financial Statements
	The accompanying condensed consolidated balance sheets and the condensed consolidated statements of operations, comprehensive income (loss), and cash flows are unaudited. These unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (‘‘GAAP’’) on the same basis as the audited consolidated financial statements and, in the opinion of management, reflect all adjustments, consisting of only normal recurring adjustments, considered necessary to present fairly the Company’s financial position, results of operations and cash flows. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014, or any other future interim or annual period.
	These unaudited interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 21, 2014. The December 31, 2013 consolidated balance sheet included herein was derived from the audited financial statements as of that date.
	Basis of Presentation
	The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in the unaudited condensed consolidated financial statements.
	Segment Reporting
	Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker, the Chief Executive Officer, in making decisions regarding resource allocation and accessing performance. To date, the Company has viewed its operations and manages its business as one operating segment.
	Concentrations of Risk
	The Company’s accounts receivable are derived from revenue earned from dealers and distributors primarily located in the United States and Canada. The Company’s sales to dealers and distributors located outside the United States are generally denominated in United States dollars, except for sales to dealers and distributors located in the United Kingdom, which are denominated in pounds sterling. There were no individual account balances greater than 10% of total accounts receivable at December 31, 2013 and June 30, 2014.
	No dealer or distributor accounted for more than 10% of total revenue for the three and six months ended June 30, 2013 and 2014.
	The Company relies on a limited number of suppliers for its contract manufacturing. A significant disruption in the operations of these manufacturers would impact the production of the Company’s products for a substantial period of time, which could have a material adverse effect on the Company’s business, financial condition and results of operations.
	Geographic Information
	The Company’s revenue includes amounts earned through sales to dealers and distributors located outside of the United States. With the exception of Canada, no single foreign country accounted for more than 10% of total revenue for the three and six months ended June 30, 2013 and 2014. The following table sets forth revenue from the United States, Canada and all other international dealers and distributors combined (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Revenue-United States	$	21,102		$	25,074		$	38,804		$	46,621
	Revenue-Canada	4,066			3,423			7,411			6,662
	Revenue-all other international sources	7,375			8,164			12,899			15,233
	Total revenue	$	32,543		$	36,661		$	59,114		$	68,516
	International revenue (excluding Canada) as a percent of total revenue	23		%	22		%	22		%	22		%
	Use of Accounting Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates including those related to revenue recognition, sales returns, provisions for doubtful accounts, product warranty, inventory obsolescence, litigation, determination of fair value of stock options, deferred tax asset valuation allowances and income taxes. Actual results may differ from those estimates.
	Product Warranty
	The Company provides its customers a limited product warranty of two years, which requires the Company to repair or replace (at its option) defective products during the warranty period at no cost to the customer. The Company estimates the costs that may be incurred to replace or repair defective products and records a reserve at the time revenue is recognized. Factors that affect the Company’s warranty liability include the number of installed systems, the Company’s historical experience and management’s judgment regarding anticipated rates of product warranty returns, net of refurbished products. The Company assesses the adequacy of its recorded warranty liability each period and makes adjustments to the liability as necessary. Warranty costs accrued includes amounts accrued for products at the time of shipment, adjustments for changes in estimated costs for warranties on products shipped in the period, and changes in estimated costs for warranties on products shipped in prior periods. It is not practicable for the Company to determine the amounts applicable to each of these components.
	The following table presents the changes in the product warranty liability (in thousands):
		Warranty Liability
	Balance at December 31, 2013	$	1,213
	Warranty costs accrued	458
	Warranty claims	(517		)
	Balance at June 30, 2014	$	1,154
	Net Income (Loss) Per Share
	Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted-average number of common shares outstanding and potentially dilutive common shares outstanding during the period that have a dilutive effect on net income per share. Potentially dilutive common shares result from the assumed exercise of outstanding stock options and the assumed conversion of outstanding convertible preferred stock and warrants using the if-converted method. In a net loss position, diluted net loss per share is computed using only the weighted-average number of common shares outstanding during the period, as any additional common shares would be anti-dilutive.
	The following table presents the reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Numerator:
	Net income (loss)	$	973		$	2,011		$	(498	)	$	1,472
	Denominator:
	Weighted average common stock outstanding for basic net income (loss) per common share	2,511			23,715			2,507			23,417
	Effect of dilutive securities—stock options, convertible preferred stock, and warrants to purchase common stock and preferred stock	17,847			1,956			—			2,292
	Weighted average common shares and dilutive securities outstanding	20,358			25,671			2,507			25,709
	The following weighted-average common stock equivalents were anti-dilutive and therefore were excluded from the calculation of diluted net income (loss) per share (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Convertible preferred stock	—		—		15,294		—
	Options to purchase common stock	111		1,115		4,654		746
	Warrants to purchase common stock	—		—		541		—
	Warrants to purchase preferred stock	—		—		194		—
	Total	111		1,115		20,683		746
	Recent Accounting Pronouncements
	In July 2013, the FASB issued ASU 2013-11, ‘‘Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.’’ The amended guidance requires an entity to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The guidance was effective for the Company beginning January 1, 2014. The adoption of this guidance did not have an impact on the Company’s results of operations, financial position, or cash flows as it relates only to financial statement presentation.
	In May 2014, the FASB issued ASU 2004-09, “Revenue from Contracts with Customers (Topic 606),” which amends the guidance in ASC 605, “Revenue Recognition.” The core principle of the guidance is that 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 guidance is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted.  The Company is still evaluating the impact of adopting this guidance as well as whether the Company will apply the amendments retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of applying this update at the date of initial application.

Balance_Sheet_Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2014
Balance Sheet Components	'
Balance Sheet Components	'
	2. Balance Sheet Components
	Inventories consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Finished goods	$	14,061		$	14,985
	Component parts	1,251			1,005
		$	15,312		$	15,990
	Property and equipment, net consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Computer equipment and software	$	4,152		$	4,082
	Manufacturing tooling and test equipment	2,652			2,682
	Lab and warehouse equipment	2,374			2,563
	Furniture and fixtures	2,046			2,386
	Leasehold improvements	1,450			1,572
	Marketing equipment	604			654
		13,278			13,939
	Less: accumulated depreciation	(9,335		)	(9,998		)
		$	3,943		$	3,941
	Intangible assets, net consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Acquired technology	$	1,678		$	1,678
	Less: accumulated amortization	(750		)	(946		)
		$	928		$	732
	Other assets consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Prepaid licensing	$	716		$	674
	Deposits	404			614
		$	1,120		$	1,288
	Accrued liabilities consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Sales returns and warranty accruals	$	2,137		$	2,127
	Compensation accruals	3,233			1,837
	Other accrued liabilities	544			1,548
	Current portion of settlement obligations (see Note 4)	907			887
		$	6,821		$	6,399

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Measurements	'
Fair Value Measurements	'
	3. Fair Value Measurements
	Assets Measured and Recorded at Fair Value on a Recurring Basis
	The Company’s financial assets that are measured at fair value on a recurring basis consist of money market funds and available-for-sale investments. The following three levels of inputs are used to measure the fair value of financial instruments:
	Level 1: Quoted prices in active markets for identical assets or liabilities.
	Level 2: Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3: Unobservable inputs are used when little or no market data is available.
	The fair values for substantially all of the Company’s financial assets are based on quoted prices in active markets or observable inputs. For Level 2 securities, the Company uses a third party pricing service which provides documentation on an ongoing basis that includes, among other things, pricing information with respect to reference data, methodology, inputs summarized by asset class, pricing application and corroborative information.
	The Company determines realized gains or losses on the sale of marketable securities on a specific identification method. During the three and six months ended June 30, 2014, the Company did not record significant realized gains or losses on the sales of available-for-sale investments.  The following tables show the Company’s cash and available-for-sale investments’ adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents or short- or long-term investments as of December 31, 2013 and June 30, 2014 (in thousands):
		December 31, 2013
		Adjusted		Unrealized		Unrealized			Fair Value		Cash and		Short-term		Long-term
		Cost		Gains		Losses					Cash		Investments		Investments
											Equivalents
	Cash	$	5,533	$	—	$	—		$	5,533	$	5,533	$	—	$	—
	Level 1:
	Money market funds	79,013		—		—			79,013		79,013		—		—
	Subtotal	79,013		—		—			79,013		79,013		—		—
	Total	$	84,546	$	—	$	—		$	84,546	$	84,546	$	—	$	—
		June 30, 2014
		Adjusted		Unrealized		Unrealized			Fair Value		Cash and		Short-term		Long-term
		Cost		Gains		Losses					Cash		Investments		Investments
											Equivalents
	Cash	$	10,714	$	—	$	—		$	10,714	$	10,714	$	—	$	—
	Level 1:
	Money market funds	7,699		—		—			7,699		7,699		—		—
	Subtotal	7,699		—		—			7,699		7,699		—		—
	Level 2:
	Asset-backed securities	4,463		2		—			4,465		—		—		4,465
	Corporate bonds	47,765		10		(13		)	47,762		—		29,684		18,078
	Commercial paper	17,887		2		—			17,889		—		17,889		—
	Subtotal	70,115		14		(13		)	70,116		—		47,573		22,543
	Total	$	88,528	$	14	$	(13	)	$	88,529	$	18,413	$	47,573	$	22,543
	As of June 30, 2014, the Company considers the declines in market value of its investment portfolio to be temporary in nature and does not consider any of its investments other-than-temporarily impaired. The Company typically invests in highly-rated securities, and its investment policy generally limits the amount of credit exposure to any one issuer. The policy requires investments generally to be investment grade, with the primary objective of minimizing the potential risk of principal loss. Fair values were determined for each individual security in the investment portfolio. The maturities of the Company’s long-term investments range from one to two years.  When evaluating an investment for other-than-temporary impairment the Company reviews factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, changes in market interest rates, and the Company’s intent to sell, or whether it is more likely than not it will be required to sell the investment before recovery of the investment’s cost basis. During the three and six months ended June 30, 2014, the Company did not recognize any significant impairment charges.
	Fair Value of Other Financial Instruments
	The carrying amounts reported in the accompanying consolidated financial statements for cash and cash equivalents, accounts payable and accrued liabilities approximate their fair value because of the short term nature of the accounts. The fair value of the notes payable approximates its carrying value based on the variable nature of interest rates and current market rates available to the Company (see Note 4).  As a result, the balance of the notes payable are categorized within the Level 2 fair value hierarchy.

LongTerm_Obligations

Long-Term Obligations	6 Months Ended
	Jun. 30, 2014
Long-Term Obligations	'
Long-Term Obligations	'
	4. Long-Term Obligations
	Loan and Security Agreement
	In June 2013, the Company entered into an Amended and Restated Loan and Security Agreement with Silicon Valley Bank (the “SVB Agreement”), which consists of a revolving credit facility of $13.0 million (subject to certain borrowing base restrictions) and term borrowings to fund purchases of property and equipment. All borrowings under the SVB Agreement are collateralized by the general assets of the Company. The revolving credit facility has a variable rate of interest of prime (as published in the Wall Street Journal) or LIBOR plus 2.50%, as selected by the Company. The rate was 3.25% at June 30, 2014. In addition, the Company pays an annual commitment fee of $20,000 and a quarterly unused line of credit fee of 0.375% based on the difference between the borrowing commitment of $13.0 million and the then current balance. The SVB Agreement provided for an additional $2.75 million in term borrowings to fund purchases of property and equipment through May 2014, of which $2.0 million remained unused upon expiration of the borrowing period. Term borrowings are payable in 30 equal monthly payments of principal plus interest and bear interest at prime plus 0.50%, which was 3.75% at June 30, 2014.
	Borrowing under the revolving credit facility is subject to certain collateral restrictions relating primarily to the Company’s accounts receivable and inventory levels. As of June 30, 2014, the total borrowing capacity was approximately $13.0 million, and no borrowings were outstanding. The revolving credit facility has a maturity date of May 29, 2015.
	The SVB Agreement contains various restrictive and financial covenants and the Company was in compliance with each of these covenants as of June 30, 2014.
	Settlement Obligation
	The Company has entered into various settlement agreements relating to alleged patent infringements, which included future payments under non-interest bearing, unsecured notes payable. The carrying values of the notes payable have been discounted using an implied interest rate of 3.75% and are included in accrued and other long term liabilities in the accompanying consolidated balance sheets.
	Future annual payments on the settlement obligations as of June 30, 2014 are shown in the table below (in thousands):
	2014	$	920
	2015	20
	2016	20
		960
	Less amount representing interest	(33		)
	Present value of settlement obligations	927
	Less current portion of settlement obligations	(887		)
	Long-term portion of settlement obligations	$	40

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Taxes	'
Income Taxes	'
	5. Income Taxes
	In order to determine the quarterly provision for income taxes, the Company considers the estimated annual effective tax rate, which is based on expected annual income and statutory tax rates in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter during which they occur and can be a source of variability in the effective tax rates from quarter to quarter.
	Income tax expense was $85,000 and $103,000 for the three months ended June 30, 2013 and 2014, respectively, or approximately 8% and 5% of income before income taxes, respectively.  Income tax expense was $29,000 and $103,000 for the six months ended June 30, 2013 and 2014, respectively, or approximately 6% and 7% of income before income taxes, respectively.  The effective tax rate for the three and six months ended June 30, 2014 differs from the U.S. federal statutory rate of 34% primarily due to the domestic valuation allowance offsetting most of the statutory rate, state income taxes, foreign income taxes, U.S. federal alternative minimum tax, and incentive stock options.
	Significant judgment is required in determining our provision for income taxes and evaluating our uncertain tax positions. In evaluating our ability to recover our deferred tax assets, in full or in part, we consider all available positive and negative evidence, including our past operating results, our forecast of future market growth, forecasted earnings, future taxable income and prudent and feasible tax planning strategies. Due to historical net losses incurred and the uncertainty of realizing the deferred tax assets, for all the periods presented, we have a full valuation allowance against our deferred tax assets. To the extent that we generate positive income and expect, with reasonable certainty, to continue to generate positive income we may release all or a portion of our valuation allowance in a future period. This release would result in the recognition of certain deferred tax assets and a decrease to income tax expense for the period such release is made.
	The Company files income tax returns in the United States, including various state and local jurisdictions. The Company’s subsidiaries file income tax returns in the United Kingdom, Hong Kong, China and India. The Company is subject to examination in the United States, the United Kingdom, Hong Kong, China, and India as well as various state jurisdictions. As of June 30, 2014, the Company was not under examination by any tax authorities. Tax years beginning in 2010 are subject to examination by tax authorities in the United States, although net operating loss and credit carryforwards from all years are subject to examinations and adjustments for at least three years following the year in which the attributes are used. Tax years beginning in 2011 are subject to examination by the taxing authorities in Hong Kong. Tax years beginning in 2012 are subject to examination by the taxing authorities in the United Kingdom, China, and India.

Equity_Compensation

Equity Compensation	6 Months Ended
	Jun. 30, 2014
Equity Compensation	'
Equity Compensation	'
	6. Equity Compensation
	Stock Options
	In 2003, the Board of Directors adopted the 2003 Equity Incentive Plan (the “2003 Plan”), which provided for the granting of nonqualified and incentive stock options, stock appreciation rights, stock awards and restricted stock. Under the 2003 Plan, the Company was able to grant nonqualified and incentive stock options to directors, employees and non-employees providing services to the Company. On June 11, 2013, the Company’s Board of Directors adopted the 2013 Stock Option and Incentive Plan (the “2013 Plan”), which was subsequently approved by the Company’s stockholders. The 2013 Plan became effective as of the closing of the Company’s initial public offering. To the extent that any awards outstanding under the 2003 Plan are forfeited or lapse unexercised subsequent to August 1, 2013, the shares of common stock subject to such awards will become available for issuance under the 2013 Plan. The 2013 Plan provides for annual increases in the number of reserved shares of up to 5% of the outstanding number of shares of the Company’s Common Stock as of the preceding December 31. On January 1, 2014, the number of reserved shares was increased by 1,139,255 shares in accordance with the provisions of the 2013 Plan.
	A summary of stock option activity for the six months ended June 30, 2014 is presented below:
		Shares		Weighted			Weighted			Weighted
		Subject to		Average			Average			Average
		Options		Grant Date			Exercise			Remaining
		Outstanding		Fair Value			Price			Contractual
										Life (Years)
	Balance at December 31, 2013	4,905,214					$	6.31
	Granted	838,878		$	11.72		20.68
	Exercised	(997,960	)				4.25
	Expired	(136	)				7.4
	Forfeited	(48,189	)				16.69
	Balance at June 30, 2014	4,697,807					9.18
	Exercisable options at June 30, 2014	2,694,980					5.62			5.1
	Vested and expected to vest at June 30, 2014	4,507,086					8.9			6.5
	The following table summarizes information about stock options outstanding and exercisable at June 30, 2014:
		Options Outstanding							Options Exercisable
	Range of Exercise Prices	Weighted			Number of		Weighted-		Number of		Weighted-
		Average			Underlying		Average		Underlying		Average
		Exercise			Shares		Remaining		Shares		Remaining
		Price					Contractual				Contractual
							Life (in				Life (in
							years)				years)
	$0.52 - 1.72	$	0.98		52,971		1.2		52,971		1.2
	1.97 — 3.38	2.43			410,623		1.9		410,623		1.9
	3.58 — 6.14	5.54			1,897,260		5.5		1,600,058		5.2
	6.34 — 9.94	8.27			1,062,937		7.8		527,829		7.6
	11.28 — 16.97	11.99			442,984		7.9		101,799		6.6
	17.66 — 22.92	21.01			831,032		9.6		1,700		9.1
					4,697,807				2,694,980
	For the stock option awards vested during the three and six months ended June 30, 2014, the total fair value was $1.4 million and $2.4 million, respectively. The following table summarizes the aggregate intrinsic-value of options exercised, exercisable and vested and expected to vest (in thousands):
		For the six months ended
		and as of June 30, 2014
	Options Exercised	$	16,907
	Options Exercisable	37,576
	Options Vested and Expected to Vest	49,142
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Expected volatility	56-59	%	59	%	56-59	%	56-60	%
	Expected dividends	0	%	0	%	0	%	0	%
	Expected terms (in years)	3.3-7.2		6.0-6.1		3.3-7.2		3.8-6.1
	Risk-free rate	0.8-1.7	%	1.7-1.9	%	0.8-1.7	%	1.1-2.0	%
	Total stock-based compensation expense has been classified as follows in the accompanying statements of operations (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Cost of revenue	$	15		$	28		$	31		$	48
	Research and development	319			642			555			1,120
	Sales and marketing	172			292			356			514
	General and administrative	364			446			766			973
	Total stock-based compensation expense	$	870		$	1,408		$	1,708		$	2,655
	At June 30, 2014, there was $16.0 million of total unrecognized compensation cost related to non-vested stock option awards that will be recognized over a weighted-average period of 3.1 years.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions	'
Related Party Transactions	'
	7. Related Party Transactions
	The Company has entered into sales agreements with certain of its investors. The following table sets forth revenue from product sales to companies affiliated with these investors (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Company 1	$	807	$	883	$	1,365	$	1,590
	Company 2	360		242		486		403
	Company 3	134		2		419		2
	Company 4	9		—		128		—
		$	1,310	$	1,127	$	2,398	$	1,995
	As of December 31, 2013 and June 30, 2014, the Company had accounts receivable from these companies totaling $0.6 million and $0.9 million, respectively.  Purchase and payment terms with these related parties are consistent with other non-affiliated companies.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies	'
Commitments and Contingencies	'
	8. Commitments and Contingencies
	Operating Leases
	The Company leases office and warehouse space under operating leases that expire between 2014 and 2018. The terms of the leases include periods of free rent, options for the Company to extend the leases (three to five years) and increasing rental rates over time. The Company recognizes rental expense under these operating leases on a straight line basis over the lives of the leases and has accrued for rental expense recorded but not paid.
	Rental expense was approximately $0.3 million and $0.4 million for the three months ended June 30, 2013 and 2014, respectively, and $0.7 million and $0.8 million for the six months ended June 30, 2013 and 2014, respectively.
	Future minimum rental payments required under non-cancelable operating leases with initial or remaining terms in excess of one year consist of the following as of June 30, 2014 (in thousands):
	2014	$	934
	2015	1,922
	2016	1,816
	2017	1,581
	2018	838
		$	7,091
	Purchase Commitments
	The Company had non-cancellable purchase commitments for the purchase of inventory, which extend through December 2014 totaling approximately $22.3 million at June 30, 2014.
	Indemnification
	The Company has agreed to indemnify its officers and directors for certain events or occurrences, while the officer or director is or was serving at the Company’s request in such capacity. The maximum amount of potential future indemnification is unlimited; however, the Company has a director and officer insurance policy that provides corporate reimbursement coverage that limits its exposure and enables it to recover a portion of any future amounts paid. The Company is unable to reasonably estimate the maximum amount that could be payable under these arrangements since these obligations are not capped but are conditional to the unique facts and circumstances involved. Accordingly, the Company has no liabilities recorded for these agreements as of June 30, 2014.
	Employment Agreements
	The Company has signed employment agreements with certain executive officers who are entitled to receive certain benefits if their employment is terminated by the Company, including severance payments, accelerated vesting of stock options and continuation of certain insurance benefits.
	Legal Matters
	The Company is subject to various lawsuits and other claims that arise from time to time in the ordinary course of business. These actions may be based on alleged patent infringement or other matters. For example, on April 23, 2014, Olivistar, LLC (“Olivistar”), a limited liability company organized under the laws of Texas, filed a Complaint against the Company in the Eastern District of Texas alleging that the Company’s light switches and MyHome App infringe two United States patents that Olivistar owns by assignment. On July 15, 2014, the Company filed an Answer to Olivistar’s Complaint, which seeks injunctive relief and monetary damages. Based on the Company’s preliminary investigation of the patents at issue, the Company does not believe that the products infringe any valid or enforceable claim. The Company intends to defend itself vigorously with respect to these and any other claims or litigation.
	The Company establishes reserves for specific liabilities in connection with legal actions that it deems to be probable and estimable. In management’s opinion, the Company is not currently involved in any legal proceedings that, individually or in the aggregate, could have a material effect on the Company’s financial condition, operations, or cash flows.

Description_of_Business_and_Su1

Description of Business and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Description of Business and Summary of Significant Accounting Policies	'
Basis of Presentation	'
	Basis of Presentation
	The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in the unaudited condensed consolidated financial statements.
Segment Reporting	'
	Segment Reporting
	Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker, the Chief Executive Officer, in making decisions regarding resource allocation and accessing performance. To date, the Company has viewed its operations and manages its business as one operating segment.
Concentrations of Risk	'
	Concentrations of Risk
	The Company’s accounts receivable are derived from revenue earned from dealers and distributors primarily located in the United States and Canada. The Company’s sales to dealers and distributors located outside the United States are generally denominated in United States dollars, except for sales to dealers and distributors located in the United Kingdom, which are denominated in pounds sterling. There were no individual account balances greater than 10% of total accounts receivable at December 31, 2013 and June 30, 2014.
	No dealer or distributor accounted for more than 10% of total revenue for the three and six months ended June 30, 2013 and 2014.
	The Company relies on a limited number of suppliers for its contract manufacturing. A significant disruption in the operations of these manufacturers would impact the production of the Company’s products for a substantial period of time, which could have a material adverse effect on the Company’s business, financial condition and results of operations.
Geographic Information	'
	Geographic Information
	The Company’s revenue includes amounts earned through sales to dealers and distributors located outside of the United States. With the exception of Canada, no single foreign country accounted for more than 10% of total revenue for the three and six months ended June 30, 2013 and 2014. The following table sets forth revenue from the United States, Canada and all other international dealers and distributors combined (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Revenue-United States	$	21,102		$	25,074		$	38,804		$	46,621
	Revenue-Canada	4,066			3,423			7,411			6,662
	Revenue-all other international sources	7,375			8,164			12,899			15,233
	Total revenue	$	32,543		$	36,661		$	59,114		$	68,516
	International revenue (excluding Canada) as a percent of total revenue	23		%	22		%	22		%	22		%
Use of Accounting Estimates	'
	Use of Accounting Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates including those related to revenue recognition, sales returns, provisions for doubtful accounts, product warranty, inventory obsolescence, litigation, determination of fair value of stock options, deferred tax asset valuation allowances and income taxes. Actual results may differ from those estimates.
Product Warranty	'
	Product Warranty
	The Company provides its customers a limited product warranty of two years, which requires the Company to repair or replace (at its option) defective products during the warranty period at no cost to the customer. The Company estimates the costs that may be incurred to replace or repair defective products and records a reserve at the time revenue is recognized. Factors that affect the Company’s warranty liability include the number of installed systems, the Company’s historical experience and management’s judgment regarding anticipated rates of product warranty returns, net of refurbished products. The Company assesses the adequacy of its recorded warranty liability each period and makes adjustments to the liability as necessary. Warranty costs accrued includes amounts accrued for products at the time of shipment, adjustments for changes in estimated costs for warranties on products shipped in the period, and changes in estimated costs for warranties on products shipped in prior periods. It is not practicable for the Company to determine the amounts applicable to each of these components.
	The following table presents the changes in the product warranty liability (in thousands):
		Warranty Liability
	Balance at December 31, 2013	$	1,213
	Warranty costs accrued	458
	Warranty claims	(517		)
	Balance at June 30, 2014	$	1,154
Net Income (Loss) Per Share	'
	Net Income (Loss) Per Share
	Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted-average number of common shares outstanding and potentially dilutive common shares outstanding during the period that have a dilutive effect on net income per share. Potentially dilutive common shares result from the assumed exercise of outstanding stock options and the assumed conversion of outstanding convertible preferred stock and warrants using the if-converted method. In a net loss position, diluted net loss per share is computed using only the weighted-average number of common shares outstanding during the period, as any additional common shares would be anti-dilutive.
	The following table presents the reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Numerator:
	Net income (loss)	$	973		$	2,011		$	(498	)	$	1,472
	Denominator:
	Weighted average common stock outstanding for basic net income (loss) per common share	2,511			23,715			2,507			23,417
	Effect of dilutive securities—stock options, convertible preferred stock, and warrants to purchase common stock and preferred stock	17,847			1,956			—			2,292
	Weighted average common shares and dilutive securities outstanding	20,358			25,671			2,507			25,709
	The following weighted-average common stock equivalents were anti-dilutive and therefore were excluded from the calculation of diluted net income (loss) per share (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Convertible preferred stock	—		—		15,294		—
	Options to purchase common stock	111		1,115		4,654		746
	Warrants to purchase common stock	—		—		541		—
	Warrants to purchase preferred stock	—		—		194		—
	Total	111		1,115		20,683		746
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In July 2013, the FASB issued ASU 2013-11, ‘‘Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.’’ The amended guidance requires an entity to present an unrecognized tax benefit, or a portion of an unrecognized tax benefit, in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The guidance was effective for the Company beginning January 1, 2014. The adoption of this guidance did not have an impact on the Company’s results of operations, financial position, or cash flows as it relates only to financial statement presentation.
	In May 2014, the FASB issued ASU 2004-09, “Revenue from Contracts with Customers (Topic 606),” which amends the guidance in ASC 605, “Revenue Recognition.” The core principle of the guidance is that 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 guidance is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted.  The Company is still evaluating the impact of adopting this guidance as well as whether the Company will apply the amendments retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of applying this update at the date of initial application.

Description_of_Business_and_Su2

Description of Business and Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2014
Description of Business and Summary of Significant Accounting Policies	'
Schedule of revenue from United States, Canada and all other international dealers and distributors combined	'
	The following table sets forth revenue from the United States, Canada and all other international dealers and distributors combined (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Revenue-United States	$	21,102		$	25,074		$	38,804		$	46,621
	Revenue-Canada	4,066			3,423			7,411			6,662
	Revenue-all other international sources	7,375			8,164			12,899			15,233
	Total revenue	$	32,543		$	36,661		$	59,114		$	68,516
	International revenue (excluding Canada) as a percent of total revenue	23		%	22		%	22		%	22		%
Schedule of changes in the product warranty liability	'
	The following table presents the changes in the product warranty liability (in thousands):
		Warranty Liability
	Balance at December 31, 2013	$	1,213
	Warranty costs accrued	458
	Warranty claims	(517		)
	Balance at June 30, 2014	$	1,154
Schedule of reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share	'
	The following table presents the reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Numerator:
	Net income (loss)	$	973		$	2,011		$	(498	)	$	1,472
	Denominator:
	Weighted average common stock outstanding for basic net income (loss) per common share	2,511			23,715			2,507			23,417
	Effect of dilutive securities—stock options, convertible preferred stock, and warrants to purchase common stock and preferred stock	17,847			1,956			—			2,292
	Weighted average common shares and dilutive securities outstanding	20,358			25,671			2,507			25,709
Schedule of anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share	'
	The following weighted-average common stock equivalents were anti-dilutive and therefore were excluded from the calculation of diluted net income (loss) per share (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Convertible preferred stock	—		—		15,294		—
	Options to purchase common stock	111		1,115		4,654		746
	Warrants to purchase common stock	—		—		541		—
	Warrants to purchase preferred stock	—		—		194		—
	Total	111		1,115		20,683		746

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2014
Balance Sheet Components	'
Schedule of inventories	'
	Inventories consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Finished goods	$	14,061		$	14,985
	Component parts	1,251			1,005
		$	15,312		$	15,990
Schedule of property and equipment, net	'
	Property and equipment, net consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Computer equipment and software	$	4,152		$	4,082
	Manufacturing tooling and test equipment	2,652			2,682
	Lab and warehouse equipment	2,374			2,563
	Furniture and fixtures	2,046			2,386
	Leasehold improvements	1,450			1,572
	Marketing equipment	604			654
		13,278			13,939
	Less: accumulated depreciation	(9,335		)	(9,998		)
		$	3,943		$	3,941
Schedule of intangible assets, net	'
	Intangible assets, net consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Acquired technology	$	1,678		$	1,678
	Less: accumulated amortization	(750		)	(946		)
		$	928		$	732
Schedule of other assets	'
	Other assets consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Prepaid licensing	$	716		$	674
	Deposits	404			614
		$	1,120		$	1,288
Schedule of accrued liabilities	'
	Accrued liabilities consisted of the following (in thousands):
		December 31,			June 30,
		2013			2014
	Sales returns and warranty accruals	$	2,137		$	2,127
	Compensation accruals	3,233			1,837
	Other accrued liabilities	544			1,548
	Current portion of settlement obligations (see Note 4)	907			887
		$	6,821		$	6,399

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Measurements	'
Schedule of cash and available-for-sale investments' adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents or short- or long-term investments	'
	The following tables show the Company’s cash and available-for-sale investments’ adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents or short- or long-term investments as of December 31, 2013 and June 30, 2014 (in thousands):
		December 31, 2013
		Adjusted		Unrealized		Unrealized			Fair Value		Cash and		Short-term		Long-term
		Cost		Gains		Losses					Cash		Investments		Investments
											Equivalents
	Cash	$	5,533	$	—	$	—		$	5,533	$	5,533	$	—	$	—
	Level 1:
	Money market funds	79,013		—		—			79,013		79,013		—		—
	Subtotal	79,013		—		—			79,013		79,013		—		—
	Total	$	84,546	$	—	$	—		$	84,546	$	84,546	$	—	$	—
		June 30, 2014
		Adjusted		Unrealized		Unrealized			Fair Value		Cash and		Short-term		Long-term
		Cost		Gains		Losses					Cash		Investments		Investments
											Equivalents
	Cash	$	10,714	$	—	$	—		$	10,714	$	10,714	$	—	$	—
	Level 1:
	Money market funds	7,699		—		—			7,699		7,699		—		—
	Subtotal	7,699		—		—			7,699		7,699		—		—
	Level 2:
	Asset-backed securities	4,463		2		—			4,465		—		—		4,465
	Corporate bonds	47,765		10		(13		)	47,762		—		29,684		18,078
	Commercial paper	17,887		2		—			17,889		—		17,889		—
	Subtotal	70,115		14		(13		)	70,116		—		47,573		22,543
	Total	$	88,528	$	14	$	(13	)	$	88,529	$	18,413	$	47,573	$	22,543

LongTerm_Obligations_Tables

Long-Term Obligations (Tables)	6 Months Ended
	Jun. 30, 2014
Long-Term Obligations	'
Schedule of future annual payments on the settlement obligations	'
	Future annual payments on the settlement obligations as of June 30, 2014 are shown in the table below (in thousands):
	2014	$	920
	2015	20
	2016	20
		960
	Less amount representing interest	(33		)
	Present value of settlement obligations	927
	Less current portion of settlement obligations	(887		)
	Long-term portion of settlement obligations	$	40

Equity_Compensation_Tables

Equity Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Equity Compensation	'
Summary of stock option activity	'
		Shares		Weighted			Weighted			Weighted
		Subject to		Average			Average			Average
		Options		Grant Date			Exercise			Remaining
		Outstanding		Fair Value			Price			Contractual
										Life (Years)
	Balance at December 31, 2013	4,905,214					$	6.31
	Granted	838,878		$	11.72		20.68
	Exercised	(997,960	)				4.25
	Expired	(136	)				7.4
	Forfeited	(48,189	)				16.69
	Balance at June 30, 2014	4,697,807					9.18
	Exercisable options at June 30, 2014	2,694,980					5.62			5.1
	Vested and expected to vest at June 30, 2014	4,507,086					8.9			6.5
Summary of stock options outstanding and exercisable	'
	The following table summarizes information about stock options outstanding and exercisable at June 30, 2014:
		Options Outstanding							Options Exercisable
	Range of Exercise Prices	Weighted			Number of		Weighted-		Number of		Weighted-
		Average			Underlying		Average		Underlying		Average
		Exercise			Shares		Remaining		Shares		Remaining
		Price					Contractual				Contractual
							Life (in				Life (in
							years)				years)
	$0.52 - 1.72	$	0.98		52,971		1.2		52,971		1.2
	1.97 — 3.38	2.43			410,623		1.9		410,623		1.9
	3.58 — 6.14	5.54			1,897,260		5.5		1,600,058		5.2
	6.34 — 9.94	8.27			1,062,937		7.8		527,829		7.6
	11.28 — 16.97	11.99			442,984		7.9		101,799		6.6
	17.66 — 22.92	21.01			831,032		9.6		1,700		9.1
					4,697,807				2,694,980
Summary of aggregate intrinsic-value of options exercised, exercisable and vested and expected to vest	'
	The following table summarizes the aggregate intrinsic-value of options exercised, exercisable and vested and expected to vest (in thousands):
		For the six months ended
		and as of June 30, 2014
	Options Exercised	$	16,907
	Options Exercisable	37,576
	Options Vested and Expected to Vest	49,142
Schedule of assumptions used to estimate fair value of option awards	'
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Expected volatility	56-59	%	59	%	56-59	%	56-60	%
	Expected dividends	0	%	0	%	0	%	0	%
	Expected terms (in years)	3.3-7.2		6.0-6.1		3.3-7.2		3.8-6.1
	Risk-free rate	0.8-1.7	%	1.7-1.9	%	0.8-1.7	%	1.1-2.0	%
Schedule of total stock-based compensation expense classified in statements of operations	'
	Total stock-based compensation expense has been classified as follows in the accompanying statements of operations (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2013			2014			2013			2014
	Cost of revenue	$	15		$	28		$	31		$	48
	Research and development	319			642			555			1,120
	Sales and marketing	172			292			356			514
	General and administrative	364			446			766			973
	Total stock-based compensation expense	$	870		$	1,408		$	1,708		$	2,655

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2014
Related Party Transactions	'
Schedule of revenue from product sales to companies affiliated with investors	'
	The Company has entered into sales agreements with certain of its investors. The following table sets forth revenue from product sales to companies affiliated with these investors (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2013		2014		2013		2014
	Company 1	$	807	$	883	$	1,365	$	1,590
	Company 2	360		242		486		403
	Company 3	134		2		419		2
	Company 4	9		—		128		—
		$	1,310	$	1,127	$	2,398	$	1,995

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies	'
Schedule of future minimum rental payments required under non-cancelable operating leases	'
	Future minimum rental payments required under non-cancelable operating leases with initial or remaining terms in excess of one year consist of the following as of June 30, 2014 (in thousands):
	2014	$	934
	2015	1,922
	2016	1,816
	2017	1,581
	2018	838
		$	7,091

Description_of_Business_and_Su3

Description of Business and Summary of Significant Accounting Policies (Details)	6 Months Ended
	Jun. 30, 2014
	item
Segment Reporting	'
Number of operating segments	1

Description_of_Business_and_Su4

Description of Business and Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue from U.S., Canadian and all other international dealers and distributors combined	'	'	'	'
Total revenue	$36,661	$32,543	$68,516	$59,114
International revenue (excluding Canada) as a percent of total revenue	22.00%	23.00%	22.00%	22.00%
United States	'	'	'	'
Revenue from U.S., Canadian and all other international dealers and distributors combined	'	'	'	'
Total revenue	25,074	21,102	46,621	38,804
Canada	'	'	'	'
Revenue from U.S., Canadian and all other international dealers and distributors combined	'	'	'	'
Total revenue	3,423	4,066	6,662	7,411
All other international sources	'	'	'	'
Revenue from U.S., Canadian and all other international dealers and distributors combined	'	'	'	'
Total revenue	$8,164	$7,375	$15,233	$12,899

Description_of_Business_and_Su5

Description of Business and Summary of Significant Accounting Policies (Details 3) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Product Warranty	'
Product warranty period	'2 years
Changes in the product warranty liability	'
Balance at beginning of period	$1,213
Warranty costs accrued	458
Warranty claims	-517
Balance at end of period	$1,154

Description_of_Business_and_Su6

Description of Business and Summary of Significant Accounting Policies (Details 4) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net income (loss)	$2,011	$973	$1,472	($498)
Denominator:	'	'	'	'
Weighted average common stock outstanding for basic net income (loss) per common share (in shares)	23,715	2,511	23,417	2,507
Effect of dilutive securities-stock options, convertible preferred stock, and warrants to purchase common stock and preferred stock (in shares)	1,956	17,847	2,292	'
Weighted average common shares and dilutive securities outstanding	25,671	20,358	25,709	2,507
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net loss per share	'	'	'	'
Total (in shares)	1,115	111	746	20,683
Convertible preferred stock	'	'	'	'
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net loss per share	'	'	'	'
Total (in shares)	'	'	'	15,294
Options to purchase common stock	'	'	'	'
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net loss per share	'	'	'	'
Total (in shares)	1,115	111	746	4,654
Warrants to purchase common stock	'	'	'	'
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net loss per share	'	'	'	'
Total (in shares)	'	'	'	541
Warrants to purchase preferred stock	'	'	'	'
Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net loss per share	'	'	'	'
Total (in shares)	'	'	'	194

Balance_Sheet_Components_Detai

Balance Sheet Components (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventories	'	'
Finished goods	$14,985	$14,061
Component parts	1,005	1,251
Total inventories	15,990	15,312
Property and equipment, net	'	'
Property and equipment, gross	13,939	13,278
Less: accumulated depreciation	-9,998	-9,335
Property and equipment, net	3,941	3,943
Computer equipment and software	'	'
Property and equipment, net	'	'
Property and equipment, gross	4,082	4,152
Manufacturing tooling and test equipment	'	'
Property and equipment, net	'	'
Property and equipment, gross	2,682	2,652
Lab and warehouse equipment	'	'
Property and equipment, net	'	'
Property and equipment, gross	2,563	2,374
Furniture and fixtures	'	'
Property and equipment, net	'	'
Property and equipment, gross	2,386	2,046
Leasehold improvements	'	'
Property and equipment, net	'	'
Property and equipment, gross	1,572	1,450
Marketing equipment	'	'
Property and equipment, net	'	'
Property and equipment, gross	$654	$604

Balance_Sheet_Components_Detai1

Balance Sheet Components (Details 2) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Intangible assets, net	'	'
Intangible assets, net	$732	$928
Other assets	'	'
Prepaid licensing	674	716
Deposits	614	404
Other assets total	1,288	1,120
Accrued liabilities	'	'
Sales returns and warranty accruals	2,127	2,137
Compensation accruals	1,837	3,233
Other accrued liabilities	1,548	544
Current portion of settlement obligations	887	907
Total accrued liabilities	6,399	6,821
Acquired technology	'	'
Intangible assets, net	'	'
Intangible assets, gross	1,678	1,678
Less: accumulated amortization	-946	-750
Intangible assets, net	$732	$928

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)

6 Months Ended

In Thousands, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Minimum

Maximum

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Measured on a recurring basis

Cash and Cash Equivalents

Cash and Cash Equivalents

Short-term investments

Long-term investments

Cash

Cash

Cash

Cash

Level 1

Level 1

Level 1

Level 1

Level 1

Level 1

Level 1

Level 1

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Level 2

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and Cash Equivalents

Money market funds

Money market funds

Money market funds

Money market funds

Short-term investments

Long-term investments

Asset-backed securities

Asset-backed securities

Corporate bonds

Corporate bonds

Corporate bonds

Commercial paper

Commercial paper

Cash and Cash Equivalents

Cash and Cash Equivalents

Long-term investments

Short-term investments

Long-term investments

Short-term investments

Fair Value Measurements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Adjusted Cost, available-for-sale investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$70,115

'

'

$4,463

'

$47,765

'

'

$17,887

'

Unrealized Gains, available-for-sale investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14

'

'

2

'

10

'

'

2

'

Unrealized Losses, available-for-sale investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-13

'

'

'

'

-13

'

'

'

'

Fair Value, available-for-sale investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

70,116

47,573

22,543

4,465

4,465

47,762

29,684

18,078

17,889

17,889

Assets, Adjusted Cost

'

'

88,528

84,546

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets, Unrealized Gains

'

'

14

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets, Unrealized Losses

'

'

-13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets, Fair Value

'

'

$88,529

$84,546

$18,413

$84,546

$47,573

$22,543

$10,714

$5,533

$10,714

$5,533

$7,699

$79,013

$7,699

$79,013

$7,699

$79,013

$7,699

$79,013

'

'

'

'

'

'

'

'

'

'

Maturity period of long-term investments

'1 year

'2 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LongTerm_Obligations_Details

Long-Term Obligations (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2014
			Revolving credit facility	Revolving credit facility	Revolving credit facility	Revolving credit facility	Term borrowings	Term borrowings	Term borrowings	Unsecured notes payable
					LIBOR	Prime rate	item		Prime rate
Long-Term Obligations	'	'	'	'	'	'	'	'	'	'
Maximum borrowing capacity	'	'	$13,000,000	'	'	'	'	$2,750,000	'	'
Variable interest rate basis	'	'	'	'	'LIBOR	'prime	'	'	'prime	'
Basis spread on variable rate (as a percent)	'	'	'	'	2.50%	'	'	'	0.50%	'
Interest rate at the end of period (as a percent)	'	'	'	3.25%	'	'	3.75%	'	'	'
Annual commitment fee	'	'	20,000	'	'	'	'	'	'	'
Commitment fee for quarterly unused capacity (as a percent)	'	'	0.38%	'	'	'	'	'	'	'
Number of equal monthly payments of principal plus interest	'	'	'	'	'	'	30	'	'	'
Current borrowing capacity	'	'	'	13,000,000	'	'	2,000,000	'	'	'
Borrowings outstanding	'	'	'	0	'	'	'	'	'	'
Settlement Obligation	'	'	'	'	'	'	'	'	'	'
Implied interest rate (as a percent)	'	'	'	'	'	'	'	'	'	3.75%
Future annual payments on the settlement obligations	'	'	'	'	'	'	'	'	'	'
2014	920,000	'	'	'	'	'	'	'	'	'
2015	20,000	'	'	'	'	'	'	'	'	'
2016	20,000	'	'	'	'	'	'	'	'	'
Total	960,000	'	'	'	'	'	'	'	'	'
Less amount representing interest	-33,000	'	'	'	'	'	'	'	'	'
Present value of settlement obligations	927,000	'	'	'	'	'	'	'	'	'
Less current portion of settlement obligations	-887,000	-907,000	'	'	'	'	'	'	'	'
Long-term portion of settlement obligations	$40,000	'	'	'	'	'	'	'	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Taxes	'	'	'	'
Income tax expense	($103)	($85)	($103)	($29)
Effective income tax rate (as a percent)	5.00%	8.00%	7.00%	6.00%
U.S. federal statutory rate (as a percent)	34.00%	'	34.00%	'
Minimum period for which net operating loss and credit carryforwards are subject to examinations and adjustments	'	'	'3 years	'

Equity_Compensation_Details

Equity Compensation (Details) (Stock options, USD $)	6 Months Ended	0 Months Ended
	Jun. 30, 2014	Jan. 02, 2014	Jun. 11, 2013
		2013 Plan	2013 Plan
Stock options	'	'	'
Annual increase in shares authorized for issuance as a percentage of shares outstanding as of the preceding December 31	'	'	5.00%
Increase in number of shares authorized for issuance	'	1,139,255	'
Shares Subject to Options Outstanding	'	'	'
Balance at the beginning of the period (in shares)	4,905,214	'	'
Granted (in shares)	838,878	'	'
Exercised (in shares)	-997,960	'	'
Expired (in shares)	-136	'	'
Forfeited (in shares)	-48,189	'	'
Balance at the end of the period (in shares)	4,697,807	'	'
Exercisable options (in shares)	2,694,980	'	'
Vested and expected to vest at the end of the period (in shares)	4,507,086	'	'
Weighted Average Grant Date Fair Value	'	'	'
Granted (in dollars per share)	$11.72	'	'
Weighted Average Exercise Price	'	'	'
Balance at the beginning of the period (in dollars per share)	$6.31	'	'
Granted (in dollars per share)	$20.68	'	'
Exercised (in dollars per share)	$4.25	'	'
Expired (in dollars per share)	$7.40	'	'
Forfeited (in dollars per share)	$16.69	'	'
Balance at the end of the period (in dollars per share)	$9.18	'	'
Exercisable options at the end of the period (in dollars per share)	$5.62	'	'
Vested and expected to vest (in dollars per share)	$8.90	'	'
Weighted-Average Remaining Contractual Life	'	'	'
Exercisable options	'5 years 1 month 6 days	'	'
Vested and expected to vest	'6 years 6 months	'	'

Equity_Compensation_Details_2

Equity Compensation (Details 2) (Stock Options, USD $)	6 Months Ended
	Jun. 30, 2014
Options Outstanding	'
Number of Underlying Shares	4,697,807
Options Exercisable	'
Number of Underlying Shares	2,694,980
$0.52-1.72	'
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	'
Range of Exercise Price, low end of range (in dollars per share)	$0.52
Range of Exercise Price, high end of range (in dollars per share)	$1.72
Options Outstanding	'
Weighted Average Exercise Price (in dollars per share)	$0.98
Number of Underlying Shares	52,971
Weighted-Average Remaining Contractual Life	'1 year 2 months 12 days
Options Exercisable	'
Number of Underlying Shares	52,971
Weighted-Average Remaining Contractual Life	'1 year 2 months 12 days
$1.97-3.38	'
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	'
Range of Exercise Price, low end of range (in dollars per share)	$1.97
Range of Exercise Price, high end of range (in dollars per share)	$3.38
Options Outstanding	'
Weighted Average Exercise Price (in dollars per share)	$2.43
Number of Underlying Shares	410,623
Weighted-Average Remaining Contractual Life	'1 year 10 months 24 days
Options Exercisable	'
Number of Underlying Shares	410,623
Weighted-Average Remaining Contractual Life	'1 year 10 months 24 days
$3.58-6.14	'
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	'
Range of Exercise Price, low end of range (in dollars per share)	$3.58
Range of Exercise Price, high end of range (in dollars per share)	$6.14
Options Outstanding	'
Weighted Average Exercise Price (in dollars per share)	$5.54
Number of Underlying Shares	1,897,260
Weighted-Average Remaining Contractual Life	'5 years 6 months
Options Exercisable	'
Number of Underlying Shares	1,600,058
Weighted-Average Remaining Contractual Life	'5 years 2 months 12 days
$6.34-9.94	'
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	'
Range of Exercise Price, low end of range (in dollars per share)	$6.34
Range of Exercise Price, high end of range (in dollars per share)	$9.94
Options Outstanding	'
Weighted Average Exercise Price (in dollars per share)	$8.27
Number of Underlying Shares	1,062,937
Weighted-Average Remaining Contractual Life	'7 years 9 months 18 days
Options Exercisable	'
Number of Underlying Shares	527,829
Weighted-Average Remaining Contractual Life	'7 years 7 months 6 days
$11.28-16.97	'
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	'
Range of Exercise Price, low end of range (in dollars per share)	$11.28
Range of Exercise Price, high end of range (in dollars per share)	$16.97
Options Outstanding	'
Weighted Average Exercise Price (in dollars per share)	$11.99
Number of Underlying Shares	442,984
Weighted-Average Remaining Contractual Life	'7 years 10 months 24 days
Options Exercisable	'
Number of Underlying Shares	101,799
Weighted-Average Remaining Contractual Life	'6 years 7 months 6 days
$17.66-22.92	'
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	'
Range of Exercise Price, low end of range (in dollars per share)	$17.66
Range of Exercise Price, high end of range (in dollars per share)	$22.92
Options Outstanding	'
Weighted Average Exercise Price (in dollars per share)	$21.01
Number of Underlying Shares	831,032
Weighted-Average Remaining Contractual Life	'9 years 7 months 6 days
Options Exercisable	'
Number of Underlying Shares	1,700
Weighted-Average Remaining Contractual Life	'9 years 1 month 6 days

Equity_Compensation_Details_3

Equity Compensation (Details 3) (Stock options, USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Stock options	'	'	'	'
Total fair value for the awards vested during the period	$1,400,000	'	$2,400,000	'
Intrinsic-value	'	'	'	'
Options Exercised	'	'	16,907,000	'
Options Exercisable	37,576,000	'	37,576,000	'
Options Vested and Expected to Vest	$49,142,000	'	$49,142,000	'
Assumptions used to estimate fair value of stock options	'	'	'	'
Expected volatility (as a percent)	59.00%	'	'	'
Expected dividends (as a percent)	0.00%	0.00%	0.00%	0.00%
Minimum	'	'	'	'
Assumptions used to estimate fair value of stock options	'	'	'	'
Expected volatility (as a percent)	'	56.00%	56.00%	56.00%
Expected term	'6 years	'3 years 3 months 18 days	'3 years 9 months 18 days	'3 years 3 months 18 days
Risk-free rate (as a percent)	1.70%	0.80%	1.10%	0.80%
Maximum	'	'	'	'
Assumptions used to estimate fair value of stock options	'	'	'	'
Expected volatility (as a percent)	'	59.00%	60.00%	59.00%
Expected term	'6 years 1 month 6 days	'7 years 2 months 12 days	'6 years 1 month 6 days	'7 years 2 months 12 days
Risk-free rate (as a percent)	1.90%	1.70%	2.00%	1.70%

Equity_Compensation_Details_4

Equity Compensation (Details 4) (Stock options, USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Total stock-based compensation expense	'	'	'	'
Total stock-based compensation expense	$1,408,000	$870,000	$2,655,000	$1,708,000
Total unrecognized compensation cost related to non-vested stock option awards	16,000,000	'	16,000,000	'
Weighted-average period over which unrecognized compensation cost will be recognized	'	'	'3 years 1 month 6 days	'
Cost of revenue	'	'	'	'
Total stock-based compensation expense	'	'	'	'
Total stock-based compensation expense	28,000	15,000	48,000	31,000
Research and development	'	'	'	'
Total stock-based compensation expense	'	'	'	'
Total stock-based compensation expense	642,000	319,000	1,120,000	555,000
Sales and marketing	'	'	'	'
Total stock-based compensation expense	'	'	'	'
Total stock-based compensation expense	292,000	172,000	514,000	356,000
General and administrative	'	'	'	'
Total stock-based compensation expense	'	'	'	'
Total stock-based compensation expense	$446,000	$364,000	$973,000	$766,000

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Related Party Transactions	'	'	'	'	'
Revenue from product sales	$1,127,000	$1,310,000	$1,995,000	$2,398,000	'
Accounts receivable	900,000	'	900,000	'	600,000
Investors | Company 1	'	'	'	'	'
Related Party Transactions	'	'	'	'	'
Revenue from product sales	883,000	807,000	1,590,000	1,365,000	'
Investors | Company 2	'	'	'	'	'
Related Party Transactions	'	'	'	'	'
Revenue from product sales	242,000	360,000	403,000	486,000	'
Investors | Company 3	'	'	'	'	'
Related Party Transactions	'	'	'	'	'
Revenue from product sales	2,000	134,000	2,000	419,000	'
Investors | Company 4	'	'	'	'	'
Related Party Transactions	'	'	'	'	'
Revenue from product sales	'	$9,000	'	$128,000	'

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating Leases	'	'	'	'
Rental expense	$400,000	$300,000	$800,000	$700,000
Future minimum rental payments	'	'	'	'
2014	934,000	'	934,000	'
2015	1,922,000	'	1,922,000	'
2016	1,816,000	'	1,816,000	'
2017	1,581,000	'	1,581,000	'
2018	838,000	'	838,000	'
Total	7,091,000	'	7,091,000	'
Purchase Commitments	'	'	'	'
Non-cancellable purchase commitments	$22,300,000	'	$22,300,000	'
Minimum	'	'	'	'
Operating Leases	'	'	'	'
Extension term of leases	'3 years	'	'	'
Maximum	'	'	'	'
Operating Leases	'	'	'	'
Extension term of leases	'5 years	'	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 2) (Subsequent event, Olivistar, LLC, Pending litigation)	Apr. 23, 2014
	item
Subsequent event | Olivistar, LLC | Pending litigation	'
Patent litigation	'
Number of patents infringed	2