Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 20,183		$ 26,798
Marketable securities	53,467		59,871
Accounts receivable, net allowance for doubtful accounts of $182 and $185, respectively.	26,672		26,113
Other receivables	448		498
Inventories	35,143		31,325
Prepaid expenses and other current assets	2,501		3,162
Total current assets	138,414		147,767
Property and equipment, net	25,329		25,696
Goodwill	28,673	[1]	28,866	[1]
Intangibles, net	43,067		43,465
Deposits and other assets	2,282		2,415
Total assets	237,765		248,209
Current liabilities:
Accounts payable	11,130		11,027
Accrued payroll	10,916		13,337
Accrued expenses and other current liabilities	5,403		5,260
Total current liabilities	27,449		29,624
Deferred income tax	879		879
Deferred rent	8,047		8,060
Other liabilities	419		489
Contingently issuable common stock	14,700		14,600
Convertible notes	71,270		70,407
Total liabilities	122,764		124,059
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; 100,000,000 shares authorized. 67,579,721 and 67,321,769 shares issued, respectively. 67,415,229 and 67,159,511 shares outstanding, respectively.	67		67
Treasury stock, at cost, 164,492 and 162,258 shares, respectively.	(2,363)		(2,328)
Additional paid-in capital	376,492		372,639
Accumulated deficit	(259,713)		(248,500)
Accumulated other comprehensive income	518		2,272
Total stockholders’ equity	115,001		124,150
Total liabilities and stockholders’ equity	$ 237,765		$ 248,209

[1] Difference in the value between these dates is solely due to a foreign currency translation adjustment.