Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,516,272	$ 743,429
Accounts receivable, net	1,710,665	1,978,456
Accounts receivable, related party, net		100,000
Prepaid expenses and other current assets	519,063	414,541
Deferred cost, related party		50,000
Inventories, net	1,620,509	1,921,051
Advances on contracts	710,662	648,783
Operating lease-right of use assets	15,977
Total current assets	6,093,148	5,856,260
Furniture, fixtures and equipment, net	44,976	82,557
Patents, net	382,260	435,273
Other assets	35,905	26,878
Total assets	6,556,289	6,400,968
Current liabilities:
Accounts payable	1,379,425	1,059,186
Accounts payable, related party	1,358,752	1,810,058
Accrued expenses and other payables	775,055	794,918
Accrued expenses, related party	1,057,957	686,798
Operating lease liabilities	15,977
Deferred profit, related party	340,476	421,800
Deferred revenue, related party		100,000
Total current liabilities	4,927,642	4,872,760
Total liabilities	4,927,642	4,872,760
Commitments and contingencies
Stockholders’ equity
Series A convertible preferred stock, par value $.001, authorized 5,000,000 shares, 0 and 7,000 shares issued and outstanding as of December 31, 2019 and 2018.		7
Common stock, par value $.001; authorized 75,000,000 shares; 49,410,176 shares issued and 49,376,843 shares outstanding as of December 31,2019; 33,859,034 shares issued, 2,470,566 shares to be issued, and 33,825,701 shares outstanding as of December 31, 2018;	49,410	36,330
Additional paid in capital	96,082,324	88,414,718
Accumulated deficit	(93,524,297)	(85,999,929)
Treasury stock, at cost, 33,333 shares	(911,516)	(911,516)
Total Milestone Scientific Inc. stockholders' equity	1,695,921	1,539,610
Noncontrolling interest	(67,274)	(11,402)
Total stockholders’ equity	1,628,647	1,528,208
Total liabilities and stockholders’ equity	$ 6,556,289	$ 6,400,968