Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 63,171	$ 80,752
Prepaid expenses and other current assets	5,406	2,971
Income tax receivable	1,747	1,707
Total current assets	70,324	85,430
Long-term investment	8,055	5,871
Other non-current assets	169	46
Operating lease right-of-use assets	663	1,532
Property and equipment, net	560	801
Total assets	79,771	93,680
Current liabilities:
Accounts payable	2,172	4,412
Accrued expenses	7,837	11,319
Current portion of operating lease liabilities	34	889
Current portion of long-term debt	0	15,423
Total current liabilities	10,043	32,043
Operating lease liabilities, net of current portion	55	79
Total liabilities	10,098	32,122
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, par value $0.00001 per share, 1,000,000,000 shares authorized, 47,249,729 and 39,526,299 issued and outstanding at September 30, 2020 and March 31, 2020, respectively	0	0
Additional paid-in capital	846,558	820,257
Accumulated deficit	(777,222)	(758,644)
Accumulated other comprehensive income (loss)	337	(55)
Total stockholders’ equity	69,673	61,558
Total liabilities and stockholders’ equity	$ 79,771	$ 93,680