CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net loss	$ (178,676)	$ (12,882)	$ (82,227)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	19,031	18,385	26,277
Goodwill and intangible assets impairment	165,171	0	0
Stock-based compensation	2,643	4,554	4,078
Interest expense related to amortization of debt discount and debt issuance costs	4,695	6,700	368
In-process research and development	98	102	0
Provision for doubtful accounts	584	522	404
Provision for excess and obsolete inventory	2,156	3,539	11,652
Deferred income tax (benefit) provision	(333)	251	816
Other non-cash items	(4,363)	1,913	1,464
Changes in operating assets and liabilities:
Restricted cash	4,400	(6,750)	0
Accounts receivable	1,197	(1,028)	(1,940)
Inventories	(5,456)	(4,348)	(4,407)
Prepaid expenses and other current assets	2,472	4,863	450
Other assets	(6)	(276)	64
Accounts payable	3,209	(1,042)	(3,853)
Accrued expenses and other	(6,365)	(35,130)	55,171
Deferred revenue	(333)	356	(510)
Net cash provided by (used in) operating activities	10,124	(20,271)	7,807
Investing activities:
Purchases of property and equipment	(12,247)	(11,300)	(14,352)
Purchase of intangible assets	0	0	(750)
Cash paid for acquisitions	0	0	(4,000)
Cash received from sale of assets	0	300	0
Net cash used in investing activities	(12,247)	(11,000)	(19,102)
Financing activities:
Exercise of stock options	375	26	8
Borrowings under lines of credit	141,583	163,067	154,622
Repayments under lines of credit	(144,567)	(156,106)	(168,855)
Principal payments on capital lease obligations	(747)	(766)	(434)
Proceeds from issuance of notes payable	5,000	30,350	28,000
Principal payments on notes payable	(8,176)	(5,837)	(2,654)
Net cash (used in) provided by financing activities	(6,532)	30,734	10,687
Effect of exchange rate changes on cash	149	(1,073)	(288)
Net decrease in cash	(8,506)	(1,610)	(896)
Cash at beginning of period	19,735	21,345	22,241
Cash at end of period	11,229	19,735	21,345
Supplemental disclosure of cash flow information:
Cash paid for interest	7,627	5,885	3,973
Cash paid for income taxes	621	565	1,780
Purchases of property and equipment in accounts payable	2,323	1,638	1,513
Purchase of property and equipment through capital leases	243	1,212	0
Non-cash purchases of license agreements	0	0	250
Non-cash debt discount	0	650	0
Initial fair value of warrant liability	$ 0	$ 11,280	$ 0