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Bank Loan - Additional Information (Detail) - USD ($)			3 Months Ended
	Dec. 02, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt, gross			$ 16,400,000
Long-term debt			16,300,000
Amortization expenses			110,000
Loan expense			380,000
US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Required monthly loan principal repayment			$ 364,583
Final installment date			May 09, 2022
Amortized loan costs			$ 490,000
Amortized cost on straight-line basis in months			36 months
Amortization expenses			$ 10,000	$ 40,000
Unamortized loan cost			$ 110,000
Prime Rate [Member] | US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			0.50%
One Month Libor [Member] | US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		2.25%	1.00%
Debt instrument converted rate	1.697%
Effective interest rate on debt			3.947%
Debt conversion description			The Company intends to renew the LIBOR rate contract on a monthly basis as long as it remains the most favorable option.
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			2.25%
Minimum [Member] | One Month Libor [Member] | US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Debt instrument additional basis spread			0.25%
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			2.75%
Maximum [Member] | One Month Libor [Member] | US Bank National Association Loan [Member]
Debt Instrument [Line Items]
Debt instrument additional basis spread			0.75%

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