Debt - Credit Facilities (Details) - Wells Fargo Credit Facility - USD ($)	1 Months Ended
	Jan. 31, 2019	Sep. 30, 2017	Mar. 31, 2020	Dec. 31, 2019	Jun. 14, 2019
Line of Credit Facility [Line Items]
Repayments of lines of credit	$ 5,000,000.0
Accrued interest			$ 300,000
Line of Credit
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing amount		$ 50,000,000.0
Cash balance for borrowing		100.00%
Cash balance max borrowing		$ 15,000,000.0
Line of credit facility increase		25,000,000.0
Line of credit facility, maximum indebtedness under debt covenant		20,000,000.0
Unused borrowing capacity		$ 5,000,000.0			$ 5,000,000.0
Line of credit fair value outstanding			$ 26,600,000
Weighted average interest rate			2.93%	3.72%
Unused part of credit facility			$ 7,100,000
Minimum required unused borrowing capacity			$ 5,000,000.0
Line of Credit | U.S.
Line of Credit Facility [Line Items]
Liquidity Requirements under Line of Credit Facility					30,000,000.0
Line of Credit | World Wide
Line of Credit Facility [Line Items]
Liquidity Requirements under Line of Credit Facility					$ 40,000,000.0
Line of Credit | Libor Plus Rate
Line of Credit Facility [Line Items]
Weighted average interest rate			2.93%
Line of Credit | Prime Rate
Line of Credit Facility [Line Items]
Commitment fee		0.25%
Line of Credit | Minimum
Line of Credit Facility [Line Items]
Revolver accounts receivable		80.00%
Line of Credit | Minimum | Libor Plus Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread		1.50%
Line of Credit | Minimum | Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread		0.50%
Line of Credit | Maximum
Line of Credit Facility [Line Items]
Revolver accounts receivable		85.00%
Line of Credit | Maximum | Libor Plus Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread		1.75%
Line of Credit | Maximum | Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread		0.75%