Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Mar. 31, 2018	5,772,032
Balance at Mar. 31, 2018	$ 115	$ 32,051	$ (14,059)	$ 18,107
Share-based compensation expense		112		112
Net income (loss)			(2,123)	(2,123)
Issuance of common stock for exercise of stock options for cash (in shares)	6,000
Issuance of common stock for exercise of stock options for cash	$ 1	18		19
Issuance of vested shares of restricted stock (in shares)	16,003
Issuance of vested shares of restricted stock		(32)		(32)
Shares withheld for tax payments (in shares)	5,148
Shares withheld for tax payments
Issuance of common stock for director stock grants (in shares)	47,223
Issuance of common stock for director stock grants	$ 1	169		170
Shares withheld for tax payments (in shares)	(5,148)
Balance (in shares) at Dec. 31, 2018	5,836,110
Balance at Dec. 31, 2018	$ 117	32,318	(16,182)	16,253
Balance (in shares) at Sep. 30, 2018	5,836,110
Balance at Sep. 30, 2018	$ 117	32,280	(16,470)	15,927
Share-based compensation expense		38		38
Net income (loss)			288	288
Balance (in shares) at Dec. 31, 2018	5,836,110
Balance at Dec. 31, 2018	$ 117	32,318	(16,182)	16,253
Balance (in shares) at Mar. 31, 2019	5,879,710
Balance at Mar. 31, 2019	$ 117	32,447	(17,655)	14,909
Settlement agreement with former executive (in shares)	29,078
Settlement agreement with former executive		320		320
Share-based compensation expense		72		72
Net income (loss)			266	$ 266
Issuance of common stock for exercise of stock options for cash (in shares)	2,112			2,112
Issuance of common stock for exercise of stock options for cash		4		$ 4
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
Shares withheld for tax payments (in shares)	7,685
Balance (in shares) at Dec. 31, 2019	5,925,717
Balance at Dec. 31, 2019	$ 118	32,817	(17,389)	15,546
Balance (in shares) at Sep. 30, 2019	5,913,421
Balance at Sep. 30, 2019	$ 118	32,786	(17,560)	15,344
Settlement agreement with former executive (in shares)	12,296
Settlement agreement with former executive
Share-based compensation expense		31		31
Net income (loss)			171	171
Balance (in shares) at Dec. 31, 2019	5,925,717
Balance at Dec. 31, 2019	$ 118	$ 32,817	$ (17,389)	$ 15,546