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CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Statement [Abstract]    
Revenue $ 87,584,690 $ 87,518,688
Cost of sales 77,824,732 80,687,080
Gross profit 9,759,958 6,831,608
Selling, general and administrative expenses 12,046,170 11,562,781
Loss from operations (2,286,212) (4,731,173)
Other expense:    
Other income 89,666
Interest expense (1,421,955) (2,104,851)
Total other expense, net (1,421,955) (2,015,185)
Loss before provision for income taxes (3,708,167) (6,746,358)
Provision for/ (benefit from) income taxes (53,414) 3,877
Net loss $ (3,654,753) $ (6,750,235)
Loss per common share-basic $ (0.31) $ (0.57)
Loss per common share-diluted $ (0.31) $ (0.57)
Shares used in computing loss per common share:    
Basic 11,884,307 11,808,052
Diluted 11,884,307 11,808,052