CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($)	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Net sales	$ 5,830,386	$ 4,644,805
Cost of sales	4,089,799	3,109,412
Gross profit	1,740,587	1,535,393
Selling, general and administrative	919,759	888,178
Income from operations	820,828	647,215
Other income	91	751
Interest expense	(108,782)	(193,210)
Total other expense, net	(108,691)	(192,459)
Income before income taxes	712,137	454,756
Income tax expense	287,635	9,453
Net income	424,502	445,303
Other comprehensive income (loss):
Foreign currency translation adjustments	732	(942)
Other comprehensive income (loss), before tax	732	(942)
Income tax expense on other comprehensive income	296	0
Other comprehensive income (loss), net of tax	436	(942)
Comprehensive income	$ 424,938	$ 444,361
Net income per share (basic) (in dollars per share)	$ 0.01	$ 0.02
Net income per share (diluted) (in dollars per share)	$ 0.01	$ 0.02
Weighted average number of shares outstanding (basic) (in shares)	28,824,593	27,324,593
Weighted average number of shares outstanding (diluted) (in shares)	29,766,666	27,711,919