Debt - Revolving Credit Facility (Details) - Silicon Valley Bank [Member] - Revolving Credit Facility [Member]	3 Months Ended
	Dec. 31, 2017 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000
Line of Credit Facility, Expiration Date	Mar. 31, 2020
Percent Reduction to Prime Interest Rate	0.25%
Borrowings Available On A NonFormula Basis	$ 10,000,000
Percentage of Eligible Accounts Receivable	85.00%
Percent of Eligible Inventory	50.00%
Maximum Eligible Inventory Value	$ 5,000,000
Early Termination Fee	1.00%
Covenant, Unused Availability	$ 10,000,000
Covenant, Adjusted EBITDA	$ 1,000,000
Interest Rate Increase For Noncompliance	5.00%
Line of Credit Facility, Commitment Fee Amount	$ 80,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.35%
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0