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
Beginning Balance at Mar. 31, 2023	$ 79,809		$ 35,223	$ (76,794)		$ 121,380
Beginning Balance (in shares) at Mar. 31, 2023			7,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of Adoption	(210)					(210)
Share-based compensation	44		$ 44
Net income (loss)	(20,801)					(20,801)
Ending Balance at Mar. 31, 2024	58,842		35,267	(76,794)		100,369
NICK Shareholders' Equity, Ending Balance at Mar. 31, 2024	58,842	$ 0	$ 35,267	(76,794)	$ 0	100,369
Ending Balance (in shares) at Mar. 31, 2024			7,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock from dissenting shareholders				(5,629)	5,629
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	373				373
Share-based compensation Shares			42
Issuance of restricted stock awards (in shares)			17
Acquisition of Amplex		17,644
Purchase of additional shares of Amplex	3,600	(3,600)			3,600
Net income (loss)	(5,149)	(164)			0	(5,149)
Ending Balance at Mar. 31, 2025	$ 53,140
NICK Shareholders' Equity, Ending Balance at Mar. 31, 2025		$ 13,880	$ 67	$ (82,423)	$ 41,645	$ 93,851
Ending Balance (in shares) at Mar. 31, 2025			6,696