16. Stock Option Plans (Details) - Schedule of Nonvested Share Activity - $ / shares	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Nonvested Share Activity [Abstract]
Non-vested at April 1, 2018, shares	38,500
Non-vested at April 1, 2018, weighted-average grant date fair value	$ 5.28
Granted, shares	0	7,500
Granted, weighted-average grant date fair value	$ 0
Vested, shares	(8,500)
Vested, weighted-average grant date fair value	$ 5.57
Forfeited, shares	(10,000)
Forfeited, weighted-average grant date fair value	$ 5.40
Non-vested at March 31, 2019, shares	20,000	38,500
Non-vested at March 31, 2019, weighted-average grant date fair value	$ 5.09	$ 5.28