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	OMCC Shareholder's Equity	Noncontrolling Interest
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	43		$ 43
Net income (loss)	(8,929)					(8,929)
Ending Balance at Sep. 30, 2023	70,713		$ 35,266	(76,794)		112,241
Ending Balance (in shares) at Sep. 30, 2023			7,289
Beginning Balance at Jun. 30, 2023	81,181		$ 35,249	(76,794)		122,726
Beginning Balance (in shares) at Jun. 30, 2023			7,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	17		$ 17
Net income (loss)	(10,485)					(10,485)
Ending Balance at Sep. 30, 2023	70,713		$ 35,266	(76,794)		112,241
Ending Balance (in shares) at Sep. 30, 2023			7,289
Beginning Balance at Mar. 31, 2024	58,842
NICK Shareholders' Equity, Beginning Balance at Mar. 31, 2024	58,842		$ 35,267	(76,794)		100,369	$ 58,842
Beginning 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)	(4,526)
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		103
Issuance of restricted stock awards (in shares)			17
Acquisition of Amplex	3,551	$ 17,644						$ 3,551
Purchase of Amplex shares from noncontrolling interests	1,980	(1,980)			1,980		1,980
Net income (loss)	(3,737)	74				(3,729)	(3,729)	(8)
Ending Balance at Sep. 30, 2024	52,670
NICK Shareholders' Equity, Ending Balance at Sep. 30, 2024	56,213	15,738	$ 67	(82,423)	39,755	95,271	52,670	3,543
Ending Balance (in shares) at Sep. 30, 2024			6,654
NICK Shareholders' Equity, Beginning Balance at Jun. 30, 2024	56,671	15,454	$ 67	(76,794)	34,126	95,722	53,121	3,550
Beginning Balance (in shares) at Jun. 30, 2024			6,654
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock from dissenting shareholders				(5,629)	5,629
Net income (loss)	(458)	284				(451)	(451)	(7)
Ending Balance at Sep. 30, 2024	52,670
NICK Shareholders' Equity, Ending Balance at Sep. 30, 2024	$ 56,213	$ 15,738	$ 67	$ (82,423)	$ 39,755	$ 95,271	$ 52,670	$ 3,543
Ending Balance (in shares) at Sep. 30, 2024			6,654