Condensed Consolidated Statements of Redeemable Non-Controlling Interest and Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Redeemable Non-Controlling Interest	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings
NICK Shareholders' Equity, Beginning Balance at Mar. 31, 2024	$ 58,842	$ 0	$ 35,267	$ (76,794)	$ 0	$ 100,369
Beginning Balance (in shares) at Mar. 31, 2024			7,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of dissenting shares to liability	(4,526)		$ (3,157)			(1,369)
Reclassification of dissenting shares to liability (in shares)			(652)
Redomestication from Canada to Delaware and reduction of par value			$ (32,043)		32,043
Share-based compensation	103				103
Issuance of restricted stock awards (in shares)			17
Acquisition of Amplex		17,644
Purchase of additional shares of Amplex	1,980	(1,980)			1,980
Income from operations	(3,302)	(211)				(3,302)
NICK Shareholders' Equity, Ending Balance at Jun. 30, 2024	53,097	15,453	$ 67	(76,794)	34,126	95,698
Ending Balance (in shares) at Jun. 30, 2024			6,654
Beginning Balance at Mar. 31, 2025	53,140
NICK Shareholders' Equity, Beginning Balance at Mar. 31, 2025	$ 53,140	13,880	$ 67	(82,423)	41,645	93,851
Beginning Balance (in shares) at Mar. 31, 2025			6,696
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares reissued, Amount				102	(102)
Treasury shares reissued, Number of Shares	12
Share-based compensation	$ 73				73
Income from operations	(748)	28				(748)
Ending Balance at Jun. 30, 2025	52,465
NICK Shareholders' Equity, Ending Balance at Jun. 30, 2025	$ 52,465	$ 13,908	$ 67	$ (82,321)	$ 41,616	$ 93,103
Ending Balance (in shares) at Jun. 30, 2025			6,708