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REVENUE - Net sales from customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
REVENUE
Revenue	$ 9,086	$ 8,946	$ 16,465	$ 16,932
A | Customer concentration risk | Sales revenue, net
REVENUE
Revenue		$ 1,601	$ 1,790	$ 3,362
Concentration risk percentage		18.00%	11.00%	20.00%
B | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 905	$ 898		$ 1,890
Concentration risk percentage	10.00%	10.00%		11.00%
C | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 933	$ 1,206	$ 2,778	$ 2,281
Concentration risk percentage	10.00%	13.00%	17.00%	14.00%
D | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 1,265	$ 1,041	$ 1,670
Concentration risk percentage	14.00%	12.00%	10.00%
E | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 1,561	$ 1,395	$ 3,151	$ 3,341
Concentration risk percentage	17.00%	16.00%	19.00%	19.00%
F | Customer concentration risk | Sales revenue, net
REVENUE
Revenue		$ 2,113		$ 2,992
Concentration risk percentage		23.00%		18.00%
Ranor | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 1,838	$ 4,393	$ 4,578	$ 8,281
Concentration risk percentage	20.00%	49.00%	28.00%	49.00%
Stadco | Customer concentration risk | Sales revenue, net
REVENUE
Revenue	$ 2,826	$ 3,861	$ 4,810	$ 5,585
Concentration risk percentage	31.00%	43.00%	29.00%	33.00%

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