Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 38,634	$ 21,221
Accounts receivable, net	4,153	5,834
Inventory, net	5,374	6,013
Prepaid expenses and other current assets	6,104	3,388
Total current assets	54,265	36,456
Goodwill	20,123	20,123
Intangible assets, net	14,485	14,873
Right-of-use lease assets	490	536
Property and equipment, net	186	215
Restricted cash	40	40
Total assets	89,589	72,243
Current liabilities:
Accounts payable	1,098	2,762
Accrued expenses	8,721	6,494
Accrued payroll and related expenses	1,693	2,878
Lease liabilities, current portion	196	204
Total current liabilities	11,708	12,338
Deferred royalty obligation, net	124,453	124,437
Accrued interest expense on deferred royalty obligation, less current portion	20,884	19,111
Lease liabilities, less current portion	294	332
Other noncurrent liabilities	4,568	4,112
Total liabilities	161,907	160,330
Commitments and contingencies (Note 6)
Shareholders’ deficit:
Common Stock, $0.0001 par value; 100,000,000 shares authorized, 27,448,571 and 27,402,648 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	3	3
Additional paid-in capital	986,107	984,756
Accumulated deficit	(1,062,334)	(1,076,752)
Total shareholders’ deficit	(72,318)	(88,087)
Total liabilities and shareholders’ deficit	89,589	72,243
Series C-1 Convertible Preferred Stock
Shareholders’ deficit:
Series C-12 Convertible Preferred Stock, $0.0001 par value; 11,000 shares authorized, 3,906 shares issued and outstanding at March 31, 2021 and December 31, 2020; and liquidation preference of $3,906 at March 31, 2021 and December 31, 2020	$ 3,906	$ 3,906