Note 16 - New Accounting Pronouncements (Tables)

9 Months Ended

Dec. 31, 2018

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

In the following tables, revenue is disaggregated by revenue category.

	For the Three Months Ended December 31, 2018
	Commercial		Government
Sales Distribution
Test Units	$	46,631	$	3,484,380
Repairs and Calibration		366,563		-
Replacement Parts		64,527		-
Extended Warranty		13,635		-
	$	491,356	$	3,484,380

	For the Nine Months Ended December 31, 2018
	Commercial		Government
Sales Distribution
Test Units	$	642,855	$	5,861,061
Repairs and Calibration		1,285,839		-
Replacement Parts		189,881		-
Extended Warranty		33,255		-
	$	2,151,830	$	5,861,061

Revenue from External Customers by Geographic Areas [Table Text Block]

In the following table, revenue is disaggregated by geography.

	For the Three Months Ended December 31, 2018		For the Nine Months Ended December 31, 2018
Geography
United States	$	3,088,693	$	6,363,404
International		887,043		1,649,487
Total	$	3,975,736	$	8,012,891