Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 18,168	$ 26,394
Accounts receivable, net	8,186	11,066
Royalty and licensing receivable	6,197	165
Inventories, net	13,181	12,074
Prepaid expenses and other current assets	2,223	2,815
Total current assets	47,955	52,514
Property and equipment, net	13,755	13,356
Operating lease right-of-use assets	5,274	5,853
Other Assets
Restricted cash	462	462
Other long-term assets	189	211
Total assets	67,635	72,396
Current liabilities
Accounts payable	6,443	6,920
Accrued expenses	7,014	7,135
Operating lease liabilities	1,489	1,469
Advance on research and development	3,149	2,331
Contract liability	12,000	0
Total current liabilities	30,095	17,855
Other long-term liabilities	0	1,500
Contract liability	0	12,000
Long-term debt, less debt issuance costs	24,664	19,623
Operating lease liabilities	4,433	5,071
Total liabilities	59,192	56,049
Commitments and contingencies
Stockholders’ equity
Preferred stock, $0.00001 par value: Authorized: 5,000,000 shares authorized as of June 30, 2020 and December 31, 2019; no shares issued and outstanding as of June 30, 2020 and December 31, 2019	0	0
Common stock, $0.00001 par value: Authorized: 200,000,000 shares authorized as of June 30, 2020 and December 31, 2019; 75,973,605 and 70,427,400 shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	1	1
Additional paid-in capital	524,991	521,356
Accumulated deficit	(515,633)	(504,145)
Accumulated other comprehensive loss	(916)	(865)
Total stockholders’ equity	8,443	16,347
Total liabilities and stockholders’ equity	$ 67,635	$ 72,396