BUSINESS COMBINATIONS (Details)										9 Months Ended		12 Months Ended
	Oct. 04, 2018 shares	Jul. 30, 2018 USD ($) shares	Jul. 29, 2018 USD ($)	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 ($)	Sep. 30, 2018 USD ($) FormerMember $ / shares shares	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) shares
Business Combinations [Abstract]
Earn-out payments to be paid										$ 3,101,223
Acquisition payments in 2016										3,645,666	$ 55,687
Business Combination, Assets and Liabilities Assumed [Abstract]
Goodwill										21,898,323		$ 21,898,323
Cash [Member]
Business Combinations [Abstract]
Earn-out payments to be paid										2,496,000
Stock [Member]
Business Combinations [Abstract]
Value of common stock										$ 605,223
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
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
Bigtech Software Private Limited [Member] | Subsequent Event [Member]
Business Combinations [Abstract]
Common stock, shares issued at closing (in shares) | shares	72,570
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%
Earn-out payments to be paid										$ 3,300,000
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		$ 800,000				$ 10,400,000
Price per share (in dollars per share) | $ / shares						$ 6.51				$ 2.40
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								$ 200,000
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