CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME
Net sales	$ 16,007,288	$ 16,702,558
Cost of sales	12,868,086	12,118,190
Gross profit	3,139,202	4,584,368
Selling, general and administrative	2,785,486	2,746,543
Provision for claims settlement	495,000
(Loss) income from operations	(141,284)	1,837,825
Other income	22,750	41,033
Interest expense	(296,076)	(354,825)
Total other expense, net	(273,326)	(313,792)
(Loss) income before (benefit) expense for income taxes	(414,610)	1,524,033
Income tax (benefit) expense	(73,041)	423,357
Net (loss) income	(341,569)	1,100,676
Other comprehensive loss, before tax:
Foreign currency translation adjustments	(252)	(2,296)
Other comprehensive loss, net of tax	(252)	(2,296)
Comprehensive (loss) income	$ (341,821)	$ 1,098,380
Net (loss) income per share - basic	$ (0.01)	$ 0.04
Net (loss) income per share - diluted	$ (0.01)	$ 0.04
Weighted average number of shares outstanding - basic	29,258,692	28,878,780
Weighted average number of shares outstanding - diluted	29,258,692	30,293,670