CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 46,582	$ 44,078
Short term investments	5,750	0
Accounts receivable, net	26,672	16,093
Inventory, net	5,133	3,881
Prepaid expenses and other current assets	1,540	1,337
Total current assets	85,677	65,389
Investments	3,250	0
Property and equipment, net of accumulated depreciation	5,447	4,086
Goodwill	4,040	4,040
Intangible assets, net of accumulated amortization	10,845	11,179
Total assets	109,259	84,694
Current liabilities:
Accounts payable	3,661	2,491
Accrued compensation	11,523	5,588
Accrued expenses	2,504	1,406
Other current liabilities	716	123
Total current liabilities	18,404	9,608
Other liabilities	1,526	1,518
Total liabilities	19,930	11,126
Commitments and contingencies (Note 17)
Stockholders' equity:
Preferred stock; $.001 par value; 5,000,000 shares authorized and 0 shares issued and outstanding	0	0
Common stock; $0.001 par value; 130,000,000 shares authorized; 108,776,247 issued and 107,789,611 outstanding at December 31, 2014 and 104,425,614 issued and 104,375,614 outstanding at December 31, 2013	108	104
Additional paid-in capital	162,433	147,284
Treasury stock at cost: 986,636 shares at December 31, 2014 and 50,000 shares at December 31, 2013	(5,637)	(25)
Accumulated deficit	(67,575)	(73,795)
Total stockholders' equity	89,329	73,568
Total liabilities and stockholders' equity	$ 109,259	$ 84,694