Credit Facility (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Credit Facility
Amount drew down				$ 100,000	$ 3,500
Principal payments of Term Loan
October 1, 2020-December 31, 2020		$ 194		194
January 1, 2021-December 31, 2021		778		778
January 1, 2022-December 31, 2022		778		778
January 1, 2023-December 31, 2023		388		388
Total		2,138		2,138
Amortization of debt issuance costs
October 1, 2020-December 31, 2020				115
January 1, 2021-December 31, 2021				457
January 1, 2022-December 31, 2022				457
January 1, 2023-December 31, 2023				120
Total				$ 1,149
Minimum
Principal payments of Term Loan
Interest rate percentage				3.00%
Maximum
Principal payments of Term Loan
Interest rate percentage				4.20%
Credit Facility
Principal payments of Term Loan
Capitalized interest expense		304	$ 33	$ 1,132	69
Amortization and interest expense expensed		114	$ 114	$ 564	$ 284
Credit Facility | LIBOR | Minimum
Credit Facility
Spread on floating interest rate (as a percent)				1.75%
Credit Facility | LIBOR | Maximum
Credit Facility
Spread on floating interest rate (as a percent)				2.75%
Credit Facility | Prime Rate | Minimum
Credit Facility
Spread on floating interest rate (as a percent)				0.75%
Credit Facility | Prime Rate | Maximum
Credit Facility
Spread on floating interest rate (as a percent)				1.75%
Revolving Line of Credit
Credit Facility
Current issued borrowing capacity		150,000		$ 150,000
Amount drew down	$ 100,000
Amount outstanding		0		$ 0		$ 0
Revolving Line of Credit | Minimum
Credit Facility
Fee on unused portion of Revolving Line of Credit (as a percent)				0.25%
Revolving Line of Credit | Maximum
Credit Facility
Fee on unused portion of Revolving Line of Credit (as a percent)				0.50%
Term Loan
Credit Facility
Current issued borrowing capacity		3,500		$ 3,500
Amount outstanding		$ 2,138		$ 2,138		$ 2,722