Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 148,475	$ 147,144
Accounts receivable, net	11,733	13,643
Inventory	5,709	3,484
Prepaid expenses and other current assets	3,760	3,789
Total current assets	169,677	168,060
Property and equipment, net	2,980	3,052
Other assets	1,513	1,538
Total assets	174,170	172,650
Current liabilities:
Accounts payable	5,403	3,625
Accrued expenses and other current liabilities	28,822	32,514
Total current liabilities	34,225	36,139
Long-term debt, net	104,656	74,531
Other liabilities	158	397
Total liabilities	139,039	111,067
Stockholders' equity:
Common stock, $0.001 par value; 200,000,000 shares authorized at March 31, 2020 and December 31, 2019; 45,906,162 shares issued and outstanding at March 31, 2020 and December 31, 2019	46	46
Additional paid-in capital	491,994	489,565
Accumulated deficit	(456,836)	(427,980)
Accumulated other comprehensive loss	(73)	(48)
Total stockholders' equity	35,131	61,583
Total liabilities and stockholders' equity	$ 174,170	$ 172,650