CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 22,814	$ 22,214
Accounts and other receivables, net	7,350	11,368
Prepaid expenses and other current assets	5,895	5,997
Inventory	3,773	2,138
Total current assets	39,832	41,717
Property and equipment, net	412	357
Operating lease right-of-use assets	2,852	3,078
Intangible assets, net	26,439	27,669
Restricted cash	150	150
Total assets	69,685	72,971
Current liabilities:
Accounts payable	3,882	4,192
Accrued expenses	5,131	6,832
Deferred revenue		15
Other current liabilities	573	481
Total current liabilities	9,586	11,520
Long-term debt	50,259	47,223
Operating lease liabilities - noncurrent	2,626	2,898
Other long-term liabilities	3,026	3,000
Total liabilities	65,497	64,641
Contingencies (Note 14)
Stockholders' equity:
Preferred stock, $.001 par value, 5,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $.001 par value, 300,000,000 and 150,000,000 shares authorized at June 30, 2020 and December 31, 2019, respectively; 125,197,899 and 109,417,322 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	125	109
Additional paid-in capital	494,633	472,667
Accumulated deficit	(491,410)	(465,286)
Accumulated other comprehensive income	840	840
Total stockholders' equity	4,188	8,330
Total liabilities and stockholders' equity	$ 69,685	$ 72,971