Note 11 - Concentrations	3 Months Ended
Mar. 31, 2020
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	NOTE 11 -- CONCENTRATIONS Milestone Scientific has informal arrangements with third -party manufacturers of the STA, epidural, and intra-articular devices, pursuant to which they manufacture these products under specific purchase orders but without any long-term contract or minimum purchase commitment. Consequently, advances on contracts have been classified as current at March 31, 2020 and December 31, 2019 . The termination of the manufacturing relationship with any of these manufacturers could have a material adverse effect on Milestone Scientific’s ability to produce and sell its products. Although alternate sources of supply exist, and new manufacturing relationships could be established, Milestone Scientific would need to recover its existing tools or have new tools produced. Establishment of new manufacturing relationships could involve significant expense and delay. Any curtailment or interruption of the supply, because of termination of such a relationship, would have a material adverse effect on Milestone Scientific’s financial condition, business and results of operations. For the three months ended March 31, 2020, and 2019 an aggregate of approximately 39% and 52% of the Company’s net product sales were from one domestic Distributor, respectively. For the three months ended March 31, 2020 net product sales were 15% from one international Distributor. Accounts receivable for the domestic and international distributor amounted to approximately or 59% and 10%, of Milestone Scientific's gross accounts receivable as of March 31, 2020, respectively. Accounts receivable for the major customer/distributor amounted to approximately or 77%, of Milestone Scientific's gross accounts receivable as of December 31, 2019. Business interruptions, including any interruptions resulting from COVID- 19 could significantly disrupt our operations and could have a material adverse impact on our business. All of our employees are located in the U.S. In addition to our employees, we rely on (i) distributors, agents and third -party logistics providers in connection with product sales and distribution and (ii) raw material and component suppliers in the U.S., Europe and China. If we, or any of these third party partners encounter any disruptions to our or their respective operations or facilities, or if we or any of these third party partners were to shut down for any reason, including by fire, natural disaster, such as a hurricane, tornado or severe storm, power outage, systems failure, labor dispute, pandemic or other unforeseen disruption, then we or they may be prevented or delayed from effectively operating our or their business, respectively.

NOTE

-- CONCENTRATIONS

Milestone Scientific has informal arrangements with

third

-party manufacturers of the STA, epidural, and intra-articular devices, pursuant to which they manufacture these products under specific purchase orders but without any long-term contract or minimum purchase commitment. Consequently, advances on contracts have been classified as current at

March 31, 2020

and

December 31, 2019 .

The termination of the manufacturing relationship with any of these manufacturers could have a material adverse effect on Milestone Scientific’s ability to produce and sell its products. Although alternate sources of supply exist, and new manufacturing relationships could be established, Milestone Scientific would need to recover its existing tools or have new tools produced. Establishment of new manufacturing relationships could involve significant expense and delay. Any curtailment or interruption of the supply, because of termination of such a relationship, would have a material adverse effect on Milestone Scientific’s financial condition, business and results of operations.

For the

three

months ended

March 31, 2020,

and

2019

an aggregate of approximately

39%

and

52%

of the Company’s net product sales were from

one

domestic Distributor, respectively. For the

three

months ended

March 31, 2020

net product sales were

15%

from

one

international Distributor. Accounts receivable for the domestic and international distributor amounted to approximately or

59%

and

10%,

of Milestone Scientific's gross accounts receivable as of

March 31, 2020,

respectively. Accounts receivable for the major customer/distributor amounted to approximately or

77%,

of Milestone Scientific's gross accounts receivable as of

December 31, 2019.

Business interruptions, including any interruptions resulting from COVID-

could significantly disrupt our operations and could have a material adverse impact on our business. All of our employees are located in the U.S. In addition to our employees, we rely on (i) distributors, agents and

third

-party logistics providers in connection with product sales and distribution and (ii) raw material and component suppliers in the U.S., Europe and China. If we, or any of these

third

party partners encounter any disruptions to our or their respective operations or facilities, or if we or any of these

third

party partners were to shut down for any reason, including by fire, natural disaster, such as a hurricane, tornado or severe storm, power outage, systems failure, labor dispute, pandemic or other unforeseen disruption, then we or they

may

be prevented or delayed from effectively operating our or their business, respectively.