CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net loss	$ (21,820)	$ (10,104)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	19,964	17,423
Stock-based compensation	2,832	2,210
Interest expense related to amortization of debt discount and debt issuance costs	285	849
Provision for doubtful accounts	225	858
Provision for excess and obsolete inventory	10,842	3,980
Deferred income tax benefit	(269)	(1,507)
Other noncash items	1,252	1,890
Changes in operating assets and liabilities:
Accounts receivable	(1,704)	3,368
Inventories	(4,720)	(5,675)
Prepaid expenses and other current assets	1,627	1,194
Other assets	57	714
Accounts payable	(1,921)	162
Accrued expenses and other	172	(3,660)
Deferred revenues	(153)	189
Net cash provided by operating activities	6,669	11,891
Investing activities:
Purchases of property and equipment	(10,975)	(12,010)
Purchase of intangible assets	(750)	0
Cash paid for acquisitions	(4,000)	(825)
Net cash used in investing activities	(15,725)	(12,835)
Financing activities:
Exercise of stock options	0	16
Borrowings under lines of credit	109,283	82,881
Repayments under lines of credit	(130,017)	(65,225)
Principal payments on notes payable and capital lease obligations	(1,705)	(12,180)
Proceeds from notes payable	28,000	0
Net cash provided by financing activities	5,561	5,492
Effect of exchange rate changes on cash and cash equivalents	(92)	727
Net increase (decrease) in cash and cash equivalents	(3,587)	5,275
Cash and cash equivalents at beginning of period	22,241	20,666
Cash and cash equivalents at end of period	18,654	25,941
Supplemental cash flow information:
Cash paid for interest	2,759	1,799
Cash paid for income taxes	804	633
Purchases of property and equipment in accounts payable	2,087	3,199
Property and equipment purchased under capital lease	$ 0	$ 1,650