CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net sales	$ 4,588,894	$ 3,656,163	$ 10,419,280	$ 8,300,968
Cost of sales	3,155,893	2,182,547	7,245,692	5,291,959
Gross profit	1,433,001	1,473,616	3,173,588	3,009,009
Selling, general and administrative	720,341	739,585	1,640,100	1,627,763
Income from operations	712,660	734,031	1,533,488	1,381,246
Other income	1,456	6,824	1,547	7,575
Interest expense	(100,414)	(183,268)	(209,196)	(376,478)
Total other expense, net	(98,958)	(176,444)	(207,649)	(368,903)
Income before income taxes	613,702	557,587	1,325,839	1,012,343
Income tax expense	245,516	11,505	533,151	20,958
Net income	368,186	546,082	792,688	991,385
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	1,854	(281)	2,586	(1,223)
Other comprehensive income (loss), before tax	1,854	(281)	2,586	(1,223)
Income tax expense on other comprehensive income	746	0	1,042	0
Other comprehensive income (loss), net of tax	1,108	(281)	1,544	(1,223)
Comprehensive income	$ 369,294	$ 545,801	$ 794,232	$ 990,162
Net income per share (basic) (in dollars per share)	$ 0.01	$ 0.02	$ 0.03	$ 0.04
Net income per share (diluted) (in dollars per share)	$ 0.01	$ 0.02	$ 0.03	$ 0.04
Weighted average number of shares outstanding (basic) (in shares)	28,824,593	27,324,593	28,824,593	27,324,593
Weighted average number of shares outstanding (diluted) (in shares)	29,730,456	28,020,795	29,751,219	27,936,098