Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 42,029	$ 45,118
Accounts receivable, net	25,661	22,600
Other receivables	323	320
Inventories	18,597	18,087
Prepaid expenses and other current assets	1,570	1,442
Total current assets	88,180	87,567
Property and equipment, net	5,615	4,984
Goodwill	28,963	29,022
Intangibles, net	43,278	43,356
Deposits and other assets	148	174
Total assets	166,184	165,103
Current liabilities:
Accounts payable	6,487	6,348
Accrued payroll	7,818	7,825
Accrued expenses and other current liabilities	4,475	3,021
Total current liabilities	18,780	17,194
Deferred income taxes	1,035	1,035
Contingently issuable common stock	57,600	52,400
Total liabilities	77,415	70,629
Commitments and contingencies
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; 5,000,000 shares authorized. No shares issued and outstanding.	0	0
Common stock, $0.001 par value; 75,000,000 shares authorized. 63,293,693 and 63,068,463 shares issued, respectively. 62,798,993 and 62,573,763 shares issued and outstanding, respectively.	63	63
Additional paid-in capital	298,639	295,338
Accumulated deficit	(209,348)	(200,014)
Treasury stock, at cost, 494,700 shares	(661)	(661)
Accumulated other comprehensive income (loss)	76	(252)
Total stockholders’ equity	88,769	94,474
Total liabilities and stockholders’ equity	$ 166,184	$ 165,103