REVENUE - Net sales from customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
REVENUE
Revenue	$ 31,644	$ 34,031
A | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 3,570	$ 5,795
Concentration risk percentage	11.00%	17.00%
B | Customer concentration risk | Sales revenue, net
REVENUE
Revenue		$ 3,327
Concentration risk percentage		10.00%
C | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 4,733	$ 4,947
Concentration risk percentage	15.00%	15.00%
D | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 3,403
Concentration risk percentage	11.00%
E | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 4,756	$ 7,671
Concentration risk percentage	15.00%	22.00%
F | Customer concentration risk | Sales revenue, net
REVENUE
Revenue		$ 5,003
Concentration risk percentage		15.00%
Ranor | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 8,068	$ 15,576
Concentration risk percentage	25.00%	46.00%
Stadco | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 8,394	$ 11,167
Concentration risk percentage	27.00%	33.00%