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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Revenue recognition |  |  |
Estimated contractual allowance | $ 3,435,352 | $ 3,586,726 |
Period for return of incorrect shipments | 10 days |  |
Number of times overstocking returns are limited | item | 2 |  |
Period for return of product due to overstock | 12 months |  |
Maximum percentage of distributor's total purchase for the prior 12-month period | 1.00% |  |
Sales, net | $ 81,862,453 | 41,797,179 | $ 33,274,702
Syringes |  |  |
Revenue recognition |  |  |
Sales, net | 68,731,795 | 35,638,427 | 28,266,046
Blood Collection Products |  |  |
Revenue recognition |  |  |
Sales, net | 2,363,887 | 2,715,697 | 1,422,842
Easy Point Needles |  |  |
Revenue recognition |  |  |
Sales, net | 9,629,173 | 2,979,005 | 3,413,409
Other Products |  |  |
Revenue recognition |  |  |
Sales, net | 1,137,598 | 464,050 | 172,405
Department of health and human |  |  |
Revenue recognition |  |  |
Sales, net | 31,600,000 |  |
U.S. |  |  |
Revenue recognition |  |  |
Sales, net | 73,803,806 | 31,897,924 | 28,646,574
U.S. | Syringes |  |  |
Revenue recognition |  |  |
Sales, net |  | 26,722,414 | 23,803,483
U.S. | Blood Collection Products |  |  |
Revenue recognition |  |  |
Sales, net |  | 2,130,767 | 1,365,936
U.S. | Easy Point Needles |  |  |
Revenue recognition |  |  |
Sales, net |  | 2,970,374 | 3,401,389
U.S. | Other Products |  |  |
Revenue recognition |  |  |
Sales, net |  | 74,369 | 75,766
U.S. government | Department of health and human |  |  |
Revenue recognition |  |  |
Sales, net | 31,634,343 |  |
U.S. government | Department of health and human | Syringes |  |  |
Revenue recognition |  |  |
Sales, net | 31,634,343 |  |
North and South America sales (excluding U.S.) |  |  |
Revenue recognition |  |  |
Sales, net | 6,893,150 | 8,248,990 | 3,597,444
North and South America sales (excluding U.S.) | Syringes |  |  |
Revenue recognition |  |  |
Sales, net | 5,733,116 | 7,863,796 | 3,521,823
North and South America sales (excluding U.S.) | Blood Collection Products |  |  |
Revenue recognition |  |  |
Sales, net | 8,450 | 6,313 | 8,805
North and South America sales (excluding U.S.) | Easy Point Needles |  |  |
Revenue recognition |  |  |
Sales, net | 86,816 | 7,996 | 252
North and South America sales (excluding U.S.) | Other Products |  |  |
Revenue recognition |  |  |
Sales, net | 1,064,768 | 370,885 | 66,564
Other international sales |  |  |
Revenue recognition |  |  |
Sales, net | 1,165,497 | 1,650,265 | 1,030,684
Other international sales | Syringes |  |  |
Revenue recognition |  |  |
Sales, net | 917,478 | 1,052,217 | 940,740
Other international sales | Blood Collection Products |  |  |
Revenue recognition |  |  |
Sales, net | 239,329 | 578,617 | 48,101
Other international sales | Easy Point Needles |  |  |
Revenue recognition |  |  |
Sales, net | 235 | 635 | 11,768
Other international sales | Other Products |  |  |
Revenue recognition |  |  |
Sales, net | 8,455 | $ 18,796 | $ 30,075
Excluding HHS Order | U.S. |  |  |
Revenue recognition |  |  |
Sales, net | 42,169,463 |  |
Excluding HHS Order | U.S. | Syringes |  |  |
Revenue recognition |  |  |
Sales, net | 30,446,858 |  |
Excluding HHS Order | U.S. | Blood Collection Products |  |  |
Revenue recognition |  |  |
Sales, net | 2,116,108 |  |
Excluding HHS Order | U.S. | Easy Point Needles |  |  |
Revenue recognition |  |  |
Sales, net | 9,542,122 |  |
Excluding HHS Order | U.S. | Other Products |  |  |
Revenue recognition |  |  |
Sales, net | $ 64,375 |  |

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