Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		12 Months Ended
	Sep. 30, 2020 USD ($)	Feb. 28, 2021 USD ($) Segment shares	Feb. 29, 2020 USD ($)	Jan. 20, 2014 shares
Summary Of Significant Accounting Policies Line Items [Line Items]
Reserves for obsolescence		$ 800	$ 800
Stock options, debentures, and other liabilities convertible into shares excluded from diluted earnings per (loss) share calculation | shares | shares		200,000
Depreciation expense		$ 223	226
Authorized stock repurchase | shares		2,632,500
Additional authorized stock repurchase | shares				1,500,000
Remaining repurchase of shares authorized | shares		490,186
Number of reportable segments | Segment		1
Remaining performance obligations		$ 664	404
Revenue, Performance Obligation, Description of Timing		We expect to recognize revenue for these remaining performance obligations over the next 24 months. We have elected not to provide disclosures regarding remaining performance obligations for contracts with a term of 1 year or less.
Forgiveness of PPP loans		$ 988	$ 0
Building | Maximum
Summary Of Significant Accounting Policies Line Items [Line Items]
Useful life		25 years
Building | Minimum
Summary Of Significant Accounting Policies Line Items [Line Items]
Useful life		10 years
Machinery and Equipment | Maximum
Summary Of Significant Accounting Policies Line Items [Line Items]
Useful life		10 years
Machinery and Equipment | Minimum
Summary Of Significant Accounting Policies Line Items [Line Items]
Useful life		5 years
FLORIDA
Summary Of Significant Accounting Policies Line Items [Line Items]
Number of consolidated Facilities		1
Pennyslavania [Member]
Summary Of Significant Accounting Policies Line Items [Line Items]
Proceeds from Sale of Buildings	$ 2,028	$ 2,000
Proceeds from loans		2,000
Forgiveness of PPP loans		$ 988
Customer Concentration Risk | Sales Revenue, Goods, Net
Summary Of Significant Accounting Policies Line Items [Line Items]
Concentration risk, percentage of consolidated net sales		36.00%
Customer Concentration Risk | Non-US | Sales Revenue, Goods, Net
Summary Of Significant Accounting Policies Line Items [Line Items]
Concentration risk, percentage of consolidated net sales		7.00%	11.00%