Quarterly report pursuant to Section 13 or 15(d)

Sales, Contract Assets and Contract Liabilities (Details)

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Sales, Contract Assets and Contract Liabilities (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Total recognized sales revenues $ 37,521,949 $ 105,024,728
Specified service works [Member]    
Total recognized sales revenues 381,338
Certified design and engineering works [Member]    
Total recognized sales revenues 9,779,337 21,517,289
Delivered equipment to customers, net of obligations [Member]    
Total recognized sales revenues 19,273,700 69,697,153
Installed and commissioned equipment [Member]    
Total recognized sales revenues $ 8,468,912 $ 134,289,487