Commitment and Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitment to acquire equipment and services	$ 7,400
Cumulative purchases made to date	7,000
Reimbursement received from government agency	7,000
Amount purchased	112			$ 270
Remaining accounts payable to vendors			$ 155	$ 124
Rent expense	225	$ 195
Rental income from noncancelable sublease	0	$ 45
Future minimum rental payments to be received under sublease	$ 0