CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Net sales	$ 4,270,396	$ 3,642,294	$ 11,990,404	$ 14,061,574
Cost of sales	3,299,166	3,219,543	8,871,550	10,465,235
Gross profit	971,230	422,751	3,118,854	3,596,339
Selling, general and administrative	631,783	596,271	2,113,285	2,236,371
Income (loss) from operations	339,447	(173,520)	1,005,569	1,359,968
Other income	1,590	86	8,605	1,633
Interest expense	(88,314)	(104,861)	(273,948)	(314,057)
Total other expense	(86,724)	(104,775)	(265,343)	(312,424)
Income (loss) before income taxes	252,723	(278,295)	740,226	1,047,544
Income tax expense	34,701	413,096	177,104	946,247
Net income (loss)	218,022	(691,391)	563,122	101,297
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	18	601	(2,402)	3,187
Other comprehensive income (loss), before tax	18	601	(2,402)	3,187
Income tax expense (benefit) on other comprehensive income (loss)	0	(36)	0	1,006
Other comprehensive income (loss), net of tax	18	637	(2,402)	2,181
Comprehensive income (loss)	$ 218,040	$ (690,754)	$ 560,720	$ 103,478
Net income (loss) per share basic	$ 0.01	$ (0.02)	$ 0.02	$ 0.00
Net income (loss) per share diluted	$ 0.01	$ (0.02)	$ 0.02	$ 0.00
Weighted average number of shares outstanding:
Basic	28,858,560	28,824,593	28,835,957	28,824,593
Diluted	30,427,218	28,824,593	30,158,509	29,564,841