Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Former Executive [Member] Common Stock [Member]	Former Executive [Member] Additional Paid-in Capital [Member]	Former Executive [Member] Retained Earnings [Member]	Former Executive [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Mar. 31, 2019					5,879,710
Balance at Mar. 31, 2019					$ 117	$ 32,447	$ (17,655)	$ 14,909
Issuance of vested shares of restricted stock (in shares)					22,502
Issuance of vested shares of restricted stock					$ 1	(26)		(25)
Shares withheld for tax payments (in shares)					(7,685)
Shares withheld for tax payments
Share-based compensation expense						41		41
Net income							95	95
Issuance of common stock for exercise of stock options for cash (in shares)					2,112
Issuance of common stock for exercise of stock options for cash						4		4
Issuance of common stock in connection with severance of former executive (in shares)					16,782
Issuance of common stock in connection with severance of former executive						(320)		(320)
Issuance of vested shares of restricted stock					(1)	26		25
Issuance of common stock in connection with severance of former executive						320		320
Balance (in shares) at Sep. 30, 2019					5,913,421
Balance at Sep. 30, 2019					$ 118	32,786	(17,560)	15,344
Balance (in shares) at Jun. 30, 2019					5,889,582
Balance at Jun. 30, 2019					$ 118	32,774	(17,788)	15,104
Issuance of vested shares of restricted stock (in shares)					7,483
Issuance of vested shares of restricted stock						7		7
Shares withheld for tax payments (in shares)					(2,538)
Shares withheld for tax payments
Share-based compensation expense						20		20
Net income							228	228
Issuance of common stock for exercise of stock options for cash (in shares)					2,112
Issuance of common stock for exercise of stock options for cash
Issuance of common stock in connection with severance of former executive (in shares)					16,782
Issuance of common stock in connection with severance of former executive						(1)		(1)
Issuance of vested shares of restricted stock						(7)		(7)
Issuance of common stock in connection with severance of former executive						1		1
Balance (in shares) at Sep. 30, 2019					5,913,421
Balance at Sep. 30, 2019					$ 118	32,786	(17,560)	15,344
Balance (in shares) at Mar. 31, 2020					6,011,885
Balance at Mar. 31, 2020					$ 120	32,994	(17,268)	15,846
Issuances of common stock for Director Stock Grants (in shares)					66,385
Issuances of common stock for Director Stock Grants					$ 1	157		158
Issuance of vested shares of restricted stock (in shares)					17,469
Issuance of vested shares of restricted stock					$ 1	(7)		(6)
Shares withheld for tax payments (in shares)	(3,635)				(6,431)
Shares withheld for tax payments
Share-based compensation expense						20		20
Net income							293	$ 293
Issuance of common stock for exercise of stock options for cash (in shares)
Issuance of common stock in connection with severance of former executive (in shares)					11,400
Issuance of common stock in connection with severance of former executive
Issuance of vested shares of restricted stock					(1)	7		6
Issuance of common stock in connection with severance of former executive
Balance (in shares) at Sep. 30, 2020					6,097,073
Balance at Sep. 30, 2020					$ 122	33,164	(16,975)	16,311
Balance (in shares) at Jun. 30, 2020					6,028,312
Balance at Jun. 30, 2020					$ 120	32,999	(17,130)	15,989
Issuances of common stock for Director Stock Grants (in shares)					66,385
Issuances of common stock for Director Stock Grants					$ 1	157		158
Issuance of vested shares of restricted stock (in shares)					3,637
Issuance of vested shares of restricted stock					$ 1	(3)		(2)
Shares withheld for tax payments (in shares)					(1,261)
Shares withheld for tax payments
Share-based compensation expense						11		11
Net income							155	155
Issuance of vested shares of restricted stock					$ (1)	3		2
Balance (in shares) at Sep. 30, 2020					6,097,073
Balance at Sep. 30, 2020					$ 122	$ 33,164	$ (16,975)	$ 16,311