CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities:
Net loss	$ (29,925)	$ (178,676)	$ (12,882)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	12,364	19,031	18,385
Goodwill and intangible assets impairment	2,189	165,171	0
Stock-based compensation	1,626	2,643	4,554
Interest expense related to amortization of debt discount and debt issuance costs	3,630	4,695	6,700
In-process research and development	0	98	102
Provision for doubtful accounts	620	584	522
Provision for excess and obsolete inventory	5,663	2,156	3,539
Deferred income tax provision (benefit)	10	(333)	251
Gain on sale of business	(7,935)	0	0
Loss on extinguishment of debt	3,863	0	0
Other non-cash items	426	(4,363)	1,913
Changes in operating assets and liabilities:
Restricted cash	2,350	4,400	(6,750)
Accounts receivable	8,000	1,197	(1,028)
Inventories	(5,742)	(5,456)	(4,348)
Prepaid expenses and other current assets	1,074	2,472	4,863
Other assets	191	(6)	(276)
Accounts payable	(4,865)	3,209	(1,042)
Accrued expenses and other	(3,498)	(6,698)	(34,774)
Net cash (used in) provided by operating activities	(9,959)	10,124	(20,271)
Investing activities:
Purchases of property and equipment	(8,897)	(12,247)	(11,300)
Purchase of intangible assets	(250)	0	0
Proceeds from sale of business, net	69,790	0	0
Cash received from sale of assets	1,316	0	300
Net cash provided by (used in) investing activities	61,959	(12,247)	(11,000)
Financing activities:
Issuance of common stock	114	375	26
Borrowings under lines of credit	118,482	141,583	163,067
Repayments under lines of credit	(134,792)	(144,567)	(156,106)
Principal payments on capital lease obligations	(798)	(747)	(766)
Proceeds from issuance of notes payable	28,046	5,000	30,350
Principal payments on notes payable	(54,444)	(8,176)	(5,837)
Net cash (used in) provided by financing activities	(43,392)	(6,532)	30,734
Effect of exchange rate changes on cash	(85)	149	(1,073)
Net increase (decrease) in cash	8,523	(8,506)	(1,610)
Cash at beginning of year, including discontinued operations	11,229	19,735	21,345
Cash at end of year, including discontinued operations	19,752	11,229	19,735
Supplemental disclosure of cash flow information:
Cash paid for interest	7,368	7,627	5,885
Cash paid for income taxes	920	621	565
Purchases of property and equipment in accounts payable	2,668	2,323	1,638
Purchase of property and equipment through capital leases	0	243	1,212
Cashless warrant conversion	1,074	0	0
Non-cash debt discount	0	0	650
Initial fair value of warrant liability	$ 0	$ 0	$ 11,280