CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 22,241	$ 20,666
Accounts receivable, net	41,012	41,711
Inventories, net	49,855	45,916
Prepaid expenses and other current assets	5,953	6,888
Deferred income tax assets	2,991	1,248
Total current assets	122,052	116,429
Property and equipment, net	30,403	31,476
Goodwill	180,838	168,609
Intangibles, net	46,856	47,144
Other assets	1,978	3,034
Total assets	382,127	366,692
Current liabilities:
Accounts payable	15,237	17,390
Accrued expenses	38,490	32,583
Deferred revenue	1,361	2,768
Current portion of long-term debt	1,700	4,396
Total current liabilities	56,788	57,137
Long-term debt, less current portion	39,967	23,802
Other long-term liabilities	13,485	12,997
Deferred income tax liabilities	2,468	3,825
Commitments and contingencies
Redeemable preferred stock, $0.0001 par value; 20,000 authorized at December 31, 2012 and 2011; 3,319 shares issued and outstanding at both December 31, 2012 and 2011	23,603	23,603
Stockholders' equity:
Common stock, $0.0001 par value; 200,000 authorized; 96,703 and 89,362 shares issued and outstanding at December 31, 2012 and 2011, respectively	10	9
Treasury stock, 19 shares	(97)	(97)
Additional paid-in capital	399,246	386,224
Accumulated other comprehensive income (loss)	112	(2,812)
Accumulated deficit	(153,455)	(137,996)
Total stockholders' equity	245,816	245,328
Total liabilities and stockholders' equity	$ 382,127	$ 366,692