COMMITMENTS (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Registration rights, description	Notwithstanding the foregoing, the underwriters may not exercise their demand and “piggyback” registration rights after five (5) and seven (7) years after the effective date of the registration statement and may not exercise their demand rights on more than one occasion. The Company will bear the expenses incurred in connection with the filing of any such registration statements.
Underwriting commitments, description	The Company granted the underwriters a 45-day option to purchase up to 3,000,000 additional Units to cover over-allotments at the Initial Public Offering price less the underwriting discounts and commissions. On October 25, 2018, the underwriters elected to partially exercise their over-allotment option to purchase 2,000,000 Units at a purchase price of $10.00 per Unit. In connection with the closing of the Initial Public Offering and the over-allotment option, the underwriters were paid a cash underwriting discount $4,400,000. In addition, the underwriters are entitled to a deferred fee of $0.35 per Unit, or $7,700,000 in the aggregate. The deferred fee will become payable to the underwriters from the amounts held in the Trust Account solely in the event that the Company completes a Business Combination, subject to the terms of the underwriting agreement. Merger Agreement On November 13, 2019, the Company, Merger Sub 1 and Merger Sub 2 (collectively, the “ChaSerg Parties”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Grid Dynamics and Automated Systems Holdings Limited (“ASL”), a company incorporated in Bermuda with limited liability, solely in its capacity as representative of the stockholders of Grid Dynamics immediately prior to the consummation of the business combination. Pursuant to the Merger Agreement, (i) Merger Sub 1 will be merged with and into Grid Dynamics, with Grid Dynamics surviving the merger on the terms and subject to the conditions set forth in the Merger Agreement (the “Initial Merger”), and (ii) as part of the same overall transaction, immediately following the Initial Merger, Grid Dynamics will be merged with and into Merger Sub 2, with Merger Sub 2 surviving on the terms and subject to the conditions set forth in the Merger Agreement (the “Second Step Merger” and, together with the Initial Merger, the “Mergers”). The purchase price will be paid to Grid Dynamics stockholders as of immediately prior to the consummation of the Business Combination in a combination of stock and cash consideration. The aggregate merger consideration (the “Merger Consideration”) to be paid pursuant to the Merger Agreement will be an amount equal to: (i) $130,000,000, subject to certain reductions (the “Cash Consideration”) and (ii) 25,523,810 shares of the Company’s Class A Common Stock (the “Share Consideration”). The Cash Consideration is subject to reduction in an amount equal to: $13,500,000 multiplied by (x) the balance of the trust account (the “Trust Account”) established by the Company for the benefit of its public stockholders as at the date of the signing of the Merger Agreement minus the Available Parent Cash, divided by (y) 30% of the Trust Account balance as at the date of the signing of the Merger Agreement, where such adjustment amount can be no more than $13,500,000 and no less than $0, and is offset by an equivalent increase in the Share Consideration. The Share Consideration is subject to customary adjustment at closing by an amount of shares of the Company’s Class A Common Stock to account for changes in working capital, indebtedness and excess cash. Excess cash also includes an adjustment mechanism for funds that are used between signing and closing for specified acquisitions. The Share Consideration is also subject to adjustment for earnings before income taxes, depreciation and amortization (“EBITDA”) performance targets, whereby the Share Consideration is reduced by $1,500,000 for every $100,000 by which the estimated total EBITDA in 2019 is below $23,800,000. The post-closing adjustment of the Share Consideration is capped at 857,143 shares of the Company’s Class A Common Stock which will be placed in escrow at closing. The obligations of the parties to consummate the Merger are subject to various conditions, including, among other things: (i) the approval of Grid Dynamics’s stockholders; (ii) the approval of the Company’s stockholders at a special meeting of the Company’s stockholders; (iii) the approval of the shareholders of ASL, including Teamsun Technology (HK) Limited (“Teamsun HK”), a company listed on the Stock Exchange of Hong Kong Limited (“HKEX”); (iv) the approval of the shareholders of Beijing Teamsun Technology Co. Ltd.
Underwriting discount	$ 4,400,000
Sale of stock, per unit	$ 0.35
Deferred underwriting fees	$ 7,700,000	$ 7,700,000
Business combination, description	The aggregate merger consideration (the “Merger Consideration”) to be paid pursuant to the Merger Agreement will be an amount equal to: (i) $130,000,000, subject to certain reductions (the “Cash Consideration”) and (ii) 25,523,810 shares of the Company’s Class A Common Stock (the “Share Consideration”). The Cash Consideration is subject to reduction in an amount equal to: $13,500,000 multiplied by (x) the balance of the trust account (the “Trust Account”) established by the Company for the benefit of its public stockholders as at the date of the signing of the Merger Agreement minus the Available Parent Cash, divided by (y) 30% of the Trust Account balance as at the date of the signing of the Merger Agreement, where such adjustment amount can be no more than $13,500,000 and no less than $0, and is offset by an equivalent increase in the Share Consideration. The Share Consideration is subject to customary adjustment at closing by an amount of shares of the Company’s Class A Common Stock to account for changes in working capital, indebtedness and excess cash. Excess cash also includes an adjustment mechanism for funds that are used between signing and closing for specified acquisitions. The Share Consideration is also subject to adjustment for earnings before income taxes, depreciation and amortization (“EBITDA”) performance targets, whereby the Share Consideration is reduced by $1,500,000 for every $100,000 by which the estimated total EBITDA in 2019 is below $23,800,000. The post-closing adjustment of the Share Consideration is capped at 857,143 shares of the Company’s Class A Common Stock which will be placed in escrow at closing.
Business combination net tangible assets	$ 5,000,001
Business combination cash and cash equivalents, percentage	70.00%

COMMITMENTS (Details) - USD ($)

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Notwithstanding the foregoing, the underwriters may not exercise their demand and “piggyback” registration rights after five (5) and seven (7) years after the effective date of the registration statement and may not exercise their demand rights on more than one occasion. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriting commitments, description

The Company granted the underwriters a 45-day option to purchase up to 3,000,000 additional Units to cover over-allotments at the Initial Public Offering price less the underwriting discounts and commissions. On October 25, 2018, the underwriters elected to partially exercise their over-allotment option to purchase 2,000,000 Units at a purchase price of $10.00 per Unit. In connection with the closing of the Initial Public Offering and the over-allotment option, the underwriters were paid a cash underwriting discount $4,400,000. In addition, the underwriters are entitled to a deferred fee of $0.35 per Unit, or $7,700,000 in the aggregate. The deferred fee will become payable to the underwriters from the amounts held in the Trust Account solely in the event that the Company completes a Business Combination, subject to the terms of the underwriting agreement. Merger Agreement On November 13, 2019, the Company, Merger Sub 1 and Merger Sub 2 (collectively, the “ChaSerg Parties”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Grid Dynamics and Automated Systems Holdings Limited (“ASL”), a company incorporated in Bermuda with limited liability, solely in its capacity as representative of the stockholders of Grid Dynamics immediately prior to the consummation of the business combination. Pursuant to the Merger Agreement, (i) Merger Sub 1 will be merged with and into Grid Dynamics, with Grid Dynamics surviving the merger on the terms and subject to the conditions set forth in the Merger Agreement (the “Initial Merger”), and (ii) as part of the same overall transaction, immediately following the Initial Merger, Grid Dynamics will be merged with and into Merger Sub 2, with Merger Sub 2 surviving on the terms and subject to the conditions set forth in the Merger Agreement (the “Second Step Merger” and, together with the Initial Merger, the “Mergers”). The purchase price will be paid to Grid Dynamics stockholders as of immediately prior to the consummation of the Business Combination in a combination of stock and cash consideration. The aggregate merger consideration (the “Merger Consideration”) to be paid pursuant to the Merger Agreement will be an amount equal to: (i) $130,000,000, subject to certain reductions (the “Cash Consideration”) and (ii) 25,523,810 shares of the Company’s Class A Common Stock (the “Share Consideration”). The Cash Consideration is subject to reduction in an amount equal to: $13,500,000 multiplied by (x) the balance of the trust account (the “Trust Account”) established by the Company for the benefit of its public stockholders as at the date of the signing of the Merger Agreement minus the Available Parent Cash, divided by (y) 30% of the Trust Account balance as at the date of the signing of the Merger Agreement, where such adjustment amount can be no more than $13,500,000 and no less than $0, and is offset by an equivalent increase in the Share Consideration. The Share Consideration is subject to customary adjustment at closing by an amount of shares of the Company’s Class A Common Stock to account for changes in working capital, indebtedness and excess cash. Excess cash also includes an adjustment mechanism for funds that are used between signing and closing for specified acquisitions. The Share Consideration is also subject to adjustment for earnings before income taxes, depreciation and amortization (“EBITDA”) performance targets, whereby the Share Consideration is reduced by $1,500,000 for every $100,000 by which the estimated total EBITDA in 2019 is below $23,800,000. The post-closing adjustment of the Share Consideration is capped at 857,143 shares of the Company’s Class A Common Stock which will be placed in escrow at closing. The obligations of the parties to consummate the Merger are subject to various conditions, including, among other things: (i) the approval of Grid Dynamics’s stockholders; (ii) the approval of the Company’s stockholders at a special meeting of the Company’s stockholders; (iii) the approval of the shareholders of ASL, including Teamsun Technology (HK) Limited (“Teamsun HK”), a company listed on the Stock Exchange of Hong Kong Limited (“HKEX”); (iv) the approval of the shareholders of Beijing Teamsun Technology Co. Ltd.

Underwriting discount

$ 4,400,000

Sale of stock, per unit

$ 0.35

Deferred underwriting fees

$ 7,700,000

Business combination, description

The aggregate merger consideration (the “Merger Consideration”) to be paid pursuant to the Merger Agreement will be an amount equal to: (i) $130,000,000, subject to certain reductions (the “Cash Consideration”) and (ii) 25,523,810 shares of the Company’s Class A Common Stock (the “Share Consideration”). The Cash Consideration is subject to reduction in an amount equal to: $13,500,000 multiplied by (x) the balance of the trust account (the “Trust Account”) established by the Company for the benefit of its public stockholders as at the date of the signing of the Merger Agreement minus the Available Parent Cash, divided by (y) 30% of the Trust Account balance as at the date of the signing of the Merger Agreement, where such adjustment amount can be no more than $13,500,000 and no less than $0, and is offset by an equivalent increase in the Share Consideration. The Share Consideration is subject to customary adjustment at closing by an amount of shares of the Company’s Class A Common Stock to account for changes in working capital, indebtedness and excess cash. Excess cash also includes an adjustment mechanism for funds that are used between signing and closing for specified acquisitions. The Share Consideration is also subject to adjustment for earnings before income taxes, depreciation and amortization (“EBITDA”) performance targets, whereby the Share Consideration is reduced by $1,500,000 for every $100,000 by which the estimated total EBITDA in 2019 is below $23,800,000. The post-closing adjustment of the Share Consideration is capped at 857,143 shares of the Company’s Class A Common Stock which will be placed in escrow at closing.

Business combination net tangible assets

$ 5,000,001

Business combination cash and cash equivalents, percentage

70.00%