|
Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
|
Mar. 31, 2015
|
Mar. 31, 2014
|
| Cash flows from operating activities |
|
|
|
| Net loss |
$ (17,554)us-gaap_NetIncomeLoss |
|
$ (7,337)us-gaap_NetIncomeLoss |
| Adjustments to reconcile net loss to net cash used in operating activities: |
|
|
|
| Depreciation and amortization |
2,577us-gaap_DepreciationDepletionAndAmortization |
|
1,332us-gaap_DepreciationDepletionAndAmortization |
| Write-down of inventory to net realizable value |
377us-gaap_InventoryWriteDown |
|
305us-gaap_InventoryWriteDown |
| Recovery of doubtful accounts |
(60)us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries |
|
|
| Stock-based compensation |
2,143us-gaap_ShareBasedCompensation |
|
1,576us-gaap_ShareBasedCompensation |
| Excess tax benefit from stock options |
|
|
(1,394)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities |
| Loss on disposal of property and equipment |
7us-gaap_GainLossOnDispositionOfAssets |
|
3us-gaap_GainLossOnDispositionOfAssets |
| Amortization/accretion of marketable securities |
(1)us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments |
|
4us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments |
| Changes in assets and liabilities: |
|
|
|
| Accounts receivable |
(4,961)us-gaap_IncreaseDecreaseInAccountsReceivable |
|
(5,904)us-gaap_IncreaseDecreaseInAccountsReceivable |
| Inventories |
3,796us-gaap_IncreaseDecreaseInInventories |
|
(5,561)us-gaap_IncreaseDecreaseInInventories |
| Prepaid expenses and other assets |
103us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets |
|
(682)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets |
| Accounts payable |
1,670us-gaap_IncreaseDecreaseInAccountsPayable |
|
2,860us-gaap_IncreaseDecreaseInAccountsPayable |
| Accrued and other liabilities |
1,237us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities |
|
810us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities |
| Deferred credits and income |
(34)us-gaap_IncreaseDecreaseInDeferredRevenue |
|
377us-gaap_IncreaseDecreaseInDeferredRevenue |
| Net cash used in operating activities |
(10,700)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations |
|
(13,611)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations |
| Cash flows from investing activities |
|
|
|
| Purchases of property and equipment |
(225)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
|
(2,409)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
| Purchases of marketable securities |
(3,998)us-gaap_PaymentsToAcquireMarketableSecurities |
|
(11,996)us-gaap_PaymentsToAcquireMarketableSecurities |
| Proceeds from sales and maturities of marketable securities |
6,000us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities |
|
9,100us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities |
| Change in restricted cash |
|
|
170us-gaap_IncreaseDecreaseInRestrictedCash |
| Net cash provided by (used in) investing activities |
1,777us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations |
|
(5,135)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations |
| Cash flows from financing activities |
|
|
|
| Proceeds from exercise of stock options |
167us-gaap_ProceedsFromStockOptionsExercised |
|
422us-gaap_ProceedsFromStockOptionsExercised |
| Tax payment related to RSUs |
(152)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation |
|
(157)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation |
| Excess tax benefit from stock options |
|
|
1,394us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities |
| Net cash provided by financing activities |
15us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations |
|
1,659us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations |
| Net decrease in cash and cash equivalents |
(8,908)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease |
|
(17,087)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease |
| Cash and cash equivalents |
|
|
|
| Beginning of period |
46,184us-gaap_CashAndCashEquivalentsAtCarryingValue |
[1] |
124,691us-gaap_CashAndCashEquivalentsAtCarryingValue |
| End of period |
37,276us-gaap_CashAndCashEquivalentsAtCarryingValue |
|
107,604us-gaap_CashAndCashEquivalentsAtCarryingValue |
| Supplemental disclosures: |
|
|
|
| Accrual for purchases of property, plant and equipment |
|
|
$ 215us-gaap_CapitalExpendituresIncurredButNotYetPaid |
|
|
|