Recent Accounting Pronouncements - Adoption of ASC 842 (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Oct. 01, 2019	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 4,586	$ 4,800	$ 0
Total assets	106,989	114,362	109,562
Operating lease liabilities	823	800	0
Total current liabilities	25,007	31,519	30,719
Operating lease liabilities - non-current	3,882	4,000	0
Total liabilities	30,860	37,616	32,816
Total liabilities and equity	$ 106,989	114,362	109,562
Restatement
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		4,800
Total assets		4,800
Operating lease liabilities		800
Total current liabilities		800
Operating lease liabilities - non-current		4,000
Total liabilities		4,800
Total liabilities and equity		$ 4,800
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total assets			109,562
Total current liabilities			30,719
Total liabilities			32,816
Total liabilities and equity			$ 109,562