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REVENUE (Tables) | 3 Months Ended
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Jun. 30, 2023
Schedule of net sales on a disaggregated basis by market and contract type | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net Sales by market |  | Defense |  | Industrial |  | Totals
Three months ended June 30, 2023 | ​ | $ | 6,597,893 | ​ | $ | 773,347 | ​ | $ | 7,371,240
Three months ended June 30, 2022 | ​ | $ | 6,840,924 | ​ | $ | 235,433 | ​ | $ | 7,076,357
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net Sales by contract type |  | Over-time |  | Point-in-time |  | Totals
Three months ended June 30, 2023 | ​ | $ | 6,933,804 | ​ | $ | 437,436 | ​ | $ | 7,371,240
Three months ended June 30, 2022 | ​ | $ | 6,622,093 | ​ | $ | 454,264 | ​ | $ | 7,076,357
Schedule of contract assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Progress | ​ | ​ | ​
​ |  | Unbilled |  | payments |  | Total
June 30, 2023 | ​ | $ | 19,914,513 | ​ | $ | (11,263,170) | ​ | $ | 8,651,343
March 31, 2023 | ​ | $ | 19,485,914 | ​ | $ | (10,538,103) | ​ | $ | 8,947,811
Sales |
Schedule of accounts receivable from customers who accounted for more than 10% of our net sales | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Three months ended | ​
​ | ​ | June 30, 2023 | ​ | June 30, 2022 |
Customer |  | Amount |  | Percent |  | Amount |  | Percent |
A | ​ | $ | 2,285,275 |  | 31 | % | $ | 1,296,387 |  | 18 | %
B | ​ | $ | 866,171 |  | 12 | % | $ | 1,763,591 |  | 25 | %
C | ​ | $ | 805,690 |  | 11 | % | $ | 735,758 |  | 11 | %
D | ​ | $ | * | ​ | * | % | $ | 1,071,874 | ​ | 15 | %
E | ​ | $ | 800,512 | ​ | 11 | % | $ | * | ​ | * | %
F | ​ | $ | 743,237 | ​ | 10 | % | $ | * | ​ | * | %
*Less than 10% of total

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