Note 13 - Restatements - Error Corrections and Prior Period Adjustments (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2018	Mar. 31, 2017
Net revenues	$ 1,021,042	$ 931,139	$ 1,146,355	$ 3,754,212	$ 5,271,231
Cost of revenue	471,062	351,894	620,795	1,865,908	2,611,493
Gross Profit	$ 549,980	$ 579,245	$ 525,560	1,888,304	2,659,738
Gross Profit %	54.00%	62.00%	46.00%
Operating income (loss)	$ 83,775	$ 76,835	$ 3,741	(66,188)	1,138,561
Net Income (Loss)	(147,695)	36	(72,367)	109,737	1,205,760
Inventory Write Off				312,830	8,343
Chemical [Member]
Net revenues	432,803	310,757	308,355	1,391,522	1,285,353
Cost of revenue	232,553	138,418	107,995
Gross Profit	$ 200,250	$ 172,339	$ 200,360
Gross Profit %	46.00%	55.00%	65.00%
Operating income (loss)	$ 2,068	$ 21,109	$ 65,446	34,611	216,371
Electronics [Member]
Net revenues	123,685	343,165	493,592	1,056,384	1,820,490
Cost of revenue	103,000	129,457	397,640
Gross Profit	$ 20,685	$ 213,708	$ 95,952
Gross Profit %	17.00%	62.00%	19.00%
Operating income (loss)	$ (34,788)	$ 63,195	$ (140,271)	(303,388)	361,484
Engineering [Member]
Net revenues	464,554	277,217	344,408	1,306,306	2,165,388
Cost of revenue	135,509	84,019	115,160
Gross Profit	$ 329,045	$ 193,198	$ 229,248
Gross Profit %	71.00%	70.00%	67.00%
Operating income (loss)	$ 116,495	$ (7,469)	$ 78,566	$ 202,589	$ 560,706
Previously Reported [Member]
Net revenues	1,021,042	1,069,706	1,146,355
Cost of revenue	539,184	355,938	456,545
Gross Profit	$ 481,858	$ 713,768	$ 689,810
Gross Profit %	47.00%	67.00%	60.00%
Operating income (loss)	$ 15,653	$ 211,358	$ 167,991
Net Income (Loss)	(215,817)	134,559	91,883
Previously Reported [Member] | Chemical [Member]
Net revenues	432,803	310,757	308,355
Cost of revenue	232,553	138,418	107,995
Gross Profit	$ 200,250	$ 172,339	$ 200,360
Gross Profit %	46.00%	55.00%	65.00%
Operating income (loss)	$ 2,068	$ 21,109	$ 65,446
Previously Reported [Member] | Electronics [Member]
Net revenues	123,685	343,165	493,592
Cost of revenue	90,021	118,317	214,723
Gross Profit	$ 33,664	$ 224,848	$ 278,869
Gross Profit %	27.00%	66.00%	56.00%
Operating income (loss)	$ (21,809)	$ 74,335	$ 42,646
Previously Reported [Member] | Engineering [Member]
Net revenues	464,554	415,784	344,408
Cost of revenue	216,610	99,203	133,827
Gross Profit	$ 247,944	$ 316,581	$ 210,581
Gross Profit %	53.00%	76.00%	61.00%
Operating income (loss)	$ 35,394	$ 115,914	$ 59,899
Restatement Adjustment [Member] | Engineering [Member]
Net revenues		138,567
Cost of revenue	(81,101)	(15,184)	(18,667)
Inventory Write Off	$ 12,979	$ 11,140	$ 182,917