Notes Payable (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		7 Months Ended	9 Months Ended		12 Months Ended
	Jul. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Jul. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2014
Notes Payable
Interest Expense		$ 3	$ 118		$ 159	$ 365
Credit facility
Notes Payable
Proceeds from the issuance of debt							$ 7,000
Term loans balance paid in full	$ 3,500
Penalty for prepayment	$ 0
Accrued interest rate (as a percent)	6.50%			6.50%
Monthly payments (as a percent)				4.166%
Interest Expense		3			159
Accrued interest		$ 0			$ 0
Credit facility | Prime rate
Notes Payable
Variable interest rate				prime
Variable rate basis (as a percent)				3.25%