CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 4,098,823	$ 5,830,386
Cost of sales	3,046,299	4,089,799
Gross profit	1,052,524	1,740,587
Selling, general and administrative	730,465	919,759
Income from operations	322,059	820,828
Other income	2,740	91
Interest expense	(95,385)	(108,782)
Total other expense, net	(92,645)	(108,691)
Income before income taxes	229,414	712,137
Income tax expense	65,029	287,635
Net income	164,385	424,502
Other comprehensive (loss) income:
Foreign currency translation adjustments	(1,911)	732
Other comprehensive (loss) income, before tax	(1,911)	732
Income tax expense on other comprehensive income	0	296
Other comprehensive (loss) income, net of tax	(1,911)	436
Comprehensive income	$ 162,474	$ 424,938
Net income per share (basic)	$ 0.01	$ 0.01
Net income per share (diluted)	$ 0.01	$ 0.01
Weighted average number of shares outstanding (basic)	28,824,593	28,824,593
Weighted average number of shares outstanding (diluted)	29,096,727	29,766,666