CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 34,197	$ 57,019
Marketable securities	102,558	110,953
Accounts receivable, net	15,817	4,861
Inventory	856	791
Prepaid expenses and other current assets	3,385	5,875
Total current assets	156,813	179,499
Property and equipment, net	4,026	4,280
Intangible assets	71,459	72,951
Goodwill	18,504	18,504
Other assets	2,381	332
Total assets	253,183	275,566
Current liabilities:
Accounts payable	14,574	14,755
Accrued expenses	20,786	11,986
Current portion of lease liabilities	868	601
Total current liabilities	36,228	27,342
Other liabilities	3,301	1,703
Long-term debt	29,918	29,914
Contingent consideration	934	934
Deferred tax liability	549	549
Total liabilities	70,930	60,442
Stockholders' Equity:
Preferred stock, $0.00001 par value; 10,000,000 shares authorized and no shares issued or outstanding at March 31, 2019 and December 31, 2018
Common stock, $0.00001 par value; 100,000,000 shares authorized at March 31, 2019 and December 31, 2018; 41,269,643 and 41,210,725 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively
Additional paid-in capital	512,040	507,366
Accumulated other comprehensive loss	(49)	(69)
Accumulated deficit	(329,738)	(292,173)
Total stockholders’ equity	182,253	215,124
Total liabilities and stockholders’ equity	$ 253,183	$ 275,566