CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Cash	$ 19,735	$ 21,345
Restricted cash	4,400	0
Current assets:
Accounts receivable, net	40,440	41,395
Inventories, net	41,747	41,939
Prepaid expenses and other current assets	5,466	7,694
Deferred income tax assets	1,324	1,372
Total current assets	113,112	113,745
Property and equipment, net	26,040	28,030
Goodwill	171,333	183,004
Intangibles, net	30,259	39,064
Other assets	4,179	1,787
Total assets	344,923	365,630
Current liabilities:
Accounts payable	10,130	10,790
Accrued expenses	35,393	62,996
Deferred revenue	1,300	1,009
Common stock warrant liabilities	8,702	0
Current portion of long-term debt	8,076	4,924
Total current liabilities	63,601	79,719
Long-term debt, less current portion	74,597	49,978
Other long-term liabilities	32,220	38,784
Deferred income tax liabilities	1,948	1,870
Redeemable preferred stock, $0.0001 par value; 20,000 authorized at December 31, 2014 and 2013; 3,319 shares issued and outstanding at both December 31, 2014 and 2013	23,603	23,603
Stockholders’ equity:
Common stock, $0.0001 par value; 200,000 authorized; 99,856 and 97,599 shares issued and outstanding at December 31, 2014 and 2013, respectively	10	10
Treasury stock, 19 shares	(97)	(97)
Additional paid-in capital	413,921	403,568
Shareholder note receivable	(5,000)	0
Accumulated other comprehensive income (loss)	(11,316)	3,877
Accumulated deficit	(248,564)	(235,682)
Total stockholders’ equity	148,954	171,676
Total liabilities and stockholders’ equity	$ 344,923	$ 365,630