CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 44,161	$ 45,261
Accounts and other receivables	9,598	627
Prepaid expenses and other current assets	3,144	1,434
Inventory	1,670	279
Total current assets	58,573	47,601
Property and equipment, net	417	288
Operating lease right-of-use assets	3,291	0
Intangible assets, net	28,899	30,129
Restricted cash	150	150
Total assets	91,330	78,168
Current liabilities:
Accounts payable	6,066	2,640
Accrued expenses	4,214	3,789
Accrued development milestone		15,000
Deferred revenue		30
Operating lease liabilities - current portion	441	0
Total current liabilities	10,721	21,459
Long-term debt	46,250	17,621
Operating lease liabilities - noncurrent	3,149	0
Other long-term liabilities	3,000	1,455
Total liabilities	63,120	40,535
Contingencies (Note 13)
Stockholders' equity:
Preferred stock, $.001 par value, 5,000,000 shares authorized, no shares issued and outstanding		0
Common stock, $.001 par value, 150,000,000 shares authorized at June 30, 2019 and December 31, 2018; 106,297,792 and 95,372,236 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	106	95
Additional paid-in capital	466,493	445,192
Accumulated deficit	(439,229)	(408,493)
Accumulated other comprehensive income	840	839
Total stockholders' equity	28,210	37,633
Total liabilities and stockholders' equity	$ 91,330	$ 78,168