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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition and Income taxes (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) item	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Revenue recognition
Collection period of receivables			30 days
Estimated contractual allowance	$ 3,443,368		$ 3,443,368		$ 4,115,628
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%
Total Product Sales	9,863,272	$ 10,412,036	$ 25,011,066	$ 24,981,833
Income taxes
Income tax at the federal statutory rate (as a percent)			21.00%		35.00%
Syringes
Revenue recognition
Total Product Sales	7,548,606	9,033,328	$ 21,375,528	22,621,496
Blood Collection Products
Revenue recognition
Total Product Sales	479,122	341,512	1,036,147	867,767
Easy Point Needles
Revenue recognition
Total Product Sales	1,803,904	1,016,226	2,520,681	1,232,979
Other Products
Revenue recognition
Total Product Sales	31,640	20,970	78,713	259,591
UNITED STATES
Revenue recognition
Total Product Sales	8,747,696	8,358,847	21,665,039	20,361,847
UNITED STATES | Syringes
Revenue recognition
Total Product Sales	6,454,432	7,019,389	18,097,760	18,260,242
UNITED STATES | Blood Collection Products
Revenue recognition
Total Product Sales	466,392	309,012	991,318	821,869
UNITED STATES | Easy Point Needles
Revenue recognition
Total Product Sales	1,803,904	1,016,226	2,519,973	1,232,979
UNITED STATES | Other Products
Revenue recognition
Total Product Sales	22,968	14,220	55,988	46,757
North and South America sales (excluding U.S.)
Revenue recognition
Total Product Sales	803,654	1,900,892	2,605,591	3,728,452
North and South America sales (excluding U.S.) | Syringes
Revenue recognition
Total Product Sales	803,414	1,896,492	2,595,634	3,531,574
North and South America sales (excluding U.S.) | Blood Collection Products
Revenue recognition
Total Product Sales	240	1,700	8,805	2,944
North and South America sales (excluding U.S.) | Easy Point Needles
Revenue recognition
Total Product Sales			252
North and South America sales (excluding U.S.) | Other Products
Revenue recognition
Total Product Sales		2,700	900	193,934
Other international sales
Revenue recognition
Total Product Sales	311,922	152,297	740,436	891,534
Other international sales | Syringes
Revenue recognition
Total Product Sales	290,760	117,447	682,134	829,680
Other international sales | Blood Collection Products
Revenue recognition
Total Product Sales	12,490	30,800	36,024	42,954
Other international sales | Easy Point Needles
Revenue recognition
Total Product Sales			456
Other international sales | Other Products
Revenue recognition
Total Product Sales	$ 8,672	$ 4,050	$ 21,825	$ 18,900

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