Borrowings (Loan Agreement) (Details) - USD ($)		9 Months Ended
	Jan. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Feb. 01, 2022	Mar. 29, 2019
Line of Credit Facility [Line Items]
Loss on debt extinguishment		$ 230,000	$ 0
Line of Credit | JPMorgan Chase Bank, N.A. | ABL Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum revolving secured credit line					$ 40,000,000.0
Loss on debt extinguishment		200,000
Line of Credit | Wells Fargo Bank
Line of Credit Facility [Line Items]
Amount outstanding		$ 14,300,000
Minimum liquidity covenant	$ 7,500,000
Line of Credit | Wells Fargo Bank | ABL Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum revolving secured credit line	55,000,000.0
Borrowing rate under agreement, at period end		2.39%
Amount outstanding		$ 300,000
Avaiable for borrowing under line of credit		$ 48,600,000
Line of Credit | Wells Fargo Bank | Term Loan
Line of Credit Facility [Line Items]
Maximum revolving secured credit line	$ 15,000,000.0
Borrowing rate under agreement, at period end		5.14%
Amount outstanding		$ 14,000,000.0
Scenario, Forecast | Line of Credit | Wells Fargo Bank
Line of Credit Facility [Line Items]
Minimum liquidity covenant				$ 5,000,000.0
London Interbank Offered Rate (LIBOR) | Line of Credit | Wells Fargo Bank | Term Loan
Line of Credit Facility [Line Items]
Basis spread on variable rate	5.00%
Minimum | London Interbank Offered Rate (LIBOR) | Line of Credit | Wells Fargo Bank | ABL Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.75%
Maximum | London Interbank Offered Rate (LIBOR) | Line of Credit | Wells Fargo Bank | ABL Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%