Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 1,948	$ 1,868
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	918	1,142
Deferred taxes	(50)	134
Stock-based compensation expense	838	1,126
Provision for excess inventory	549	242
Changes in operating assets & liabilities
Accounts receivable	(10,287)	(355)
Inventories	1,143	(6,963)
Prepaid expenses and other current assets	(1,216)	(1,085)
Accounts payable and other current liabilities	1,082	11,466
Deferred revenue	226	1,455
Income taxes	30	132
Other assets and liabilities	(5,364)	(422)
Net cash (used in) provided by operating activities	(10,183)	8,740
Cash flows used in investing activities
Expenditures for property, plant, and equipment	(1,275)	(320)
Net cash used in investing activities	(1,275)	(320)
Cash flows from financing activities
Decrease in restricted cash	73	758
Financing fees and other expenses		(847)
Principal payments on term loan		(14,530)
Principal payments on sale leaseback obligation		(392)
Proceeds from sale leaseback obligation		48,940
Proceeds from exercise of stock options	194	937
Net cash provided by financing activities	267	34,866
Effect of exchange rate changes on cash	(127)	509
Net (decrease) increase in cash and cash equivalents	(11,318)	43,795
Cash and cash equivalents at beginning of period	78,889	30,753
Cash and cash equivalents at end of period	67,571	74,548
Supplemental disclosure of total cash, cash equivalents and restricted cash:
Cash and cash equivalents at end of period	67,571	74,548
Restricted cash at end of period	6,863	67
Total cash, cash equivalents and restricted cash at end of year	$ 74,434	$ 74,615