CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (unaudited)
Net sales	$ 3,412,229	$ 3,282,525
Cost of sales	2,579,561	2,585,511
Gross profit	832,668	697,014
Selling, general and administrative	732,608	793,362
Income (loss) from operations	100,060	(96,348)
Other income	10,390	652
Interest expense	(29,878)	(57,898)
PPP loan forgiveness	1,317,100
Total other income (expense), net	1,297,612	(57,246)
Income (loss) before income taxes	1,397,672	(153,594)
Income tax provision (benefit)	26,580	(37,360)
Net income (loss)	1,371,092	(116,234)
Other comprehensive income (loss):
Foreign currency translation adjustments	42	(97)
Other comprehensive income (loss), net of tax	42	(97)
Comprehensive income (loss)	$ 1,371,134	$ (116,331)
Net income (loss) per share - basic	$ 0.05	$ (0.01)
Net income (loss) per share - diluted	$ 0.04	$ (0.01)
Weighted average number of shares outstanding:
Weighted average number of shares outstanding - basic	29,498,662	29,359,921
Weighted average number of shares outstanding - diluted	31,054,110	29,359,921