Consolidated Balance Sheets (Parenthetical) $ in Thousands	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Statement Of Financial Position [Abstract]
Accounts receivable, related party amount, current	$ 0	$ 88
Prepaid expenses and other current assets, related party amount	0	3,417
Accrued expenses related party amount, current	0	1,700
Deferred revenue current related party amount	0	102
Deferred revenue non-current related party amount	$ 0	$ 57,780
Common stock, shares authorized | shares	103,901,006	90,343,803
Common stock, shares issued | shares	61,034,025	52,160,798
Common stock, shares outstanding | shares	60,783,799	51,852,862
Treasury stock, shares | shares	250,226	307,936