BUSINESS COMBINATIONS (Details)											9 Months Ended		12 Months Ended
	Feb. 04, 2019 USD ($) Installments	Oct. 04, 2018 shares	Jul. 30, 2018 shares	Jul. 29, 2018 USD ($)	Mar. 10, 2017 USD ($) shares	Sep. 22, 2016 USD ($)	Jul. 29, 2016 USD ($) $ / shares shares	Jul. 22, 2016 USD ($)	Jul. 02, 2016 USD ($) $ / shares shares	Nov. 20, 2015 USD ($)	Sep. 30, 2019 USD ($) FormerMember $ / shares shares	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2018 USD ($)
Business Combinations [Abstract]
Earn-out payments to be paid											$ 2,496,000
Acquisition payments in 2016											200,000	$ 3,645,666
Value of common stock												$ 605,223
Business Combination, Assets and Liabilities Assumed [Abstract]
Goodwill											$ 13,729,770			$ 13,729,770
Ameri Georgia [Member]
Business Combinations [Abstract]
Consideration of acquisition										$ 9,900,000
Period of capitalized intangible asset											3 years
Business Combination, Assets and Liabilities Assumed [Abstract]
Intangible Assets										1,800,000
Goodwill										3,500,000
Current Assets [Abstract]
Cash										1,400,000
Accounts Receivable										5,600,000
Other Assets										200,000
Current Assets, Total										7,300,000
Current Liabilities [Abstract]
Accounts Payable										1,300,000
Accrued Expenses & Other Current Liabilities										1,300,000
Current Liabilities, Total										2,700,000
Net Working Capital Acquired										4,600,000
Total Purchase Price										$ 9,900,000
Bigtech Software Private Limited [Member]
Business Combinations [Abstract]
Consideration of acquisition									$ 850,000
Business acquisition, cash payment at closing						$ 340,000
Common stock, shares issued at closing (in shares) | shares		72,570
Warrants purchase (in shares) | shares									51,000
Warrants purchase period											2 years
Commission to be paid in cash									$ 255,000
Value of common stock									$ 250,000
Price per share (in dollars per share) | $ / shares									$ 6.51
Business Combination, Assets and Liabilities Assumed [Abstract]
Intangible Assets									$ 600,000
Goodwill									300,000
Current Assets [Abstract]
Cash									0
Accounts Receivable									0
Other Assets									0
Current Assets, Total									0
Current Liabilities [Abstract]
Accounts Payable									0
Accrued Expenses & Other Current Liabilities									0
Current Liabilities, Total									0
Net Working Capital Acquired									0
Total Purchase Price									$ 900,000
Virtuoso [Member]
Business Combinations [Abstract]
Consideration of acquisition								$ 1,800,000
Acquisition payments in 2016													$ 60,000
Stock earn-out payments to be paid (in shares) | shares													12,408
Period of capitalized intangible asset											3 years
Business Combination, Assets and Liabilities Assumed [Abstract]
Intangible Assets								900,000
Goodwill								900,000
Current Assets [Abstract]
Cash								0
Accounts Receivable								0
Other Assets								0
Current Assets, Total								0
Current Liabilities [Abstract]
Accounts Payable								0
Accrued Expenses & Other Current Liabilities								0
Current Liabilities, Total								0
Net Working Capital Acquired								0
Total Purchase Price								$ 1,800,000
Ameri Arizona [Member]
Business Combinations [Abstract]
Consideration of acquisition							$ 15,800,000
Business acquisition, cash payment at closing				$ 2,496,000			$ 3,000,000
Common stock, shares issued at closing (in shares) | shares							1,600,000
Membership interest acquired							100.00%
Stock earn-out payments to be paid (in shares) | shares			560,000
Number of former members of company | FormerMember											2
Period of capitalized intangible asset											3 years
Value of common stock							$ 10,400,000
Price per share (in dollars per share) | $ / shares							$ 6.51				$ 2.40
Considered amount from contingent consideration	$ 200,000
Number of equal monthly installments | Installments	4
Business Combination, Assets and Liabilities Assumed [Abstract]
Intangible Assets							$ 5,400,000
Goodwill							10,400,000
Current Assets [Abstract]
Cash							0
Accounts Receivable							0
Other Assets							0
Current Assets, Total							0
Current Liabilities [Abstract]
Accounts Payable							0
Accrued Expenses & Other Current Liabilities							0
Current Liabilities, Total							0
Net Working Capital Acquired							0
Total Purchase Price							15,800,000
Ameri Arizona [Member] | Cash [Member]
Business Combinations [Abstract]
Earn-out payments to be paid							$ 1,500,000
Ameri California [Member]
Business Combinations [Abstract]
Consideration of acquisition					$ 8,800,000
Business acquisition, cash payment at closing					$ 60,000
Common stock, shares issued at closing (in shares) | shares					576,923						283,344
Membership interest acquired					100.00%
Unsecured promissory notes					$ 3,750,000
Unsecured promissory notes, percentage of interest rate					6.00%
Period of capitalized intangible asset											3 years
Value of common stock					$ 3,800,000						$ 605,000
Business Combination, Assets and Liabilities Assumed [Abstract]
Intangible Assets					3,800,000
Goodwill					5,000,000
Current Assets [Abstract]
Cash					0
Accounts Receivable					0
Other Assets					0
Current Assets, Total					0
Current Liabilities [Abstract]
Accounts Payable					0
Accrued Expenses & Other Current Liabilities					0
Current Liabilities, Total					0
Net Working Capital Acquired					0
Total Purchase Price					8,800,000
Ameri California [Member] | Stock [Member]
Business Combinations [Abstract]
Earn-out payments to be paid					$ 1,200,000