CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 45,118	$ 27,476
Inventory, net	15,986	9,467
Prepaid expenses	6,673	2,125
Income tax receivable	454	656
Other current assets	5,818	9,023
Total current assets	74,049	48,747
Property and equipment, net	17,424	14,091
Goodwill	19,976	19,976
Intangible assets, net	9,608	10,033
Deferred tax asset, net	0	25,541
Other assets	1,787	2,867
Total assets	122,844	121,255
Current liabilities:
Accounts payable	14,864	8,454
Accrued compensation	23,024	20,941
Accrued expenses	31,842	15,768
Other current liabilities	1,817	647
Total current liabilities	71,547	45,810
Other liabilities	1,642	1,648
Total liabilities	73,189	47,458
Commitments and contingencies (Note 16)	0	0
Stockholders’ equity:
Preferred stock; $0.001 par value; 5,000,000 shares authorized and 0 shares issued and outstanding	0	0
Common stock; $0.001 par value; 150,000,000 shares authorized; 112,703,926 issued and 109,098,663 outstanding at December 31, 2018 and 112,703,926 issued and 109,347,517 outstanding at December 31, 2017	113	113
Additional paid-in capital	164,744	164,649
Treasury stock at cost: 3,605,263 shares at December 31, 2018 and 3,356,409 shares at December 31, 2017	(38,642)	(44,384)
Accumulated deficit	(76,560)	(46,581)
Total stockholders’ equity	49,655	73,797
Total liabilities and stockholders’ equity	$ 122,844	$ 121,255