CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2019	Mar. 31, 2019
CONSOLIDATED BALANCE SHEETS
Allowance for doubtful accounts	$ 156,526	$ 157,903
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized	50,000,000	50,000,000
Common Stock, shares issued	19,995,969	19,995,969
Common Stock, shares outstanding	19,995,969	19,995,969
Treasury stock, shares	723,000	723,000