Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Total spectrum revenue	$ 1,418	$ 1,525
Operating expenses
General and administrative	10,449	12,851
Sales and support	1,493	1,850
Product development	1,120	1,750
Severance and other related charges	620	0
Depreciation and amortization	124	179
Operating expenses	13,806	16,630
Gain on exchange of intangible assets, net	(33,916)	(93)
Gain on sale of intangible assets, net	(961)	0
Loss from disposal of long-lived assets, net	8	0
Income (loss) from operations	22,481	(15,012)
Interest income	442	694
Other income	0	16
Income (loss) before income taxes	22,923	(14,302)
Income tax (benefit) expense	(2,257)	1,222
Net income (loss)	$ 25,180	$ (15,524)
Net income (loss) per common share basic (in dollars per share)	$ 1.35	$ (0.84)
Net income (loss) per common share diluted (in dollars per share)	$ 1.35	$ (0.84)
Weighted-average common shares used to compute basic net income (loss) per share (in shares)	18,621,701	18,486,964
Weighted-average common shares used to compute diluted net income (loss) per share (in shares)	18,704,131	18,486,964