Debt Obligations - U.S. Credit Agreement - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Nov. 01, 2018	Aug. 31, 2015
Line of Credit Facility [Line Items]
Loss on early extinguishment of debt	$ 0	$ 144,000
Credit Agreement, fee paid	300,000
U.S. Credit Agreement
Line of Credit Facility [Line Items]
Loss on early extinguishment of debt		100,000
Credit Agreement, fee paid	303,000	$ 382,000
U.S. Credit Agreement | Revolving loan
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity				$ 32,500,000.0
Available credit under credit agreement	$ 12,900,000		$ 60,000,000
Available increase under credit agreement			20,000,000
Availability under credit agreement after available increase under credit agreement			$ 80,000,000
Weighted average interest rate on outstanding borrowings	3.96%	4.56%
Credit Agreement, fee paid		$ 300,000
Credit facility collateral pledge percentage	65.00%
U.S. Credit Agreement | Term loan
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity				$ 30,000,000