Vivint Smart Home (VVNT) S-4/A 18 Nov 19 Registration of securities issued in business combination transactions (amended) Financial data

Cover

Cover	9 Months Ended
	Sep. 30, 2019
Cover page.
Document Type	S-4/A
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Entity Registrant Name	Mosaic Acquisition Corp.
Entity Central Index Key	0001713952
Entity Filer Category	Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	true
Entity Extended Transition Period	false

Condensed Balance Sheets

Condensed Balance Sheets - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 686,676	$ 892,518	$ 928,388
Prepaid expenses	161,304	112,675	293,423
Total current assets	847,980	1,005,193	1,221,811
Cash and investments held in Trust Account	354,264,460	350,437,823	345,000,000
Total Assets	355,112,440	351,443,016	346,221,811
Current liabilities:
Accounts payable	1,637	8,735	93,876
Accrued expenses	5,000		5,000
Accrued expenses - related parties	40,133	37,530	42,915
Franchise tax payable	150,000	5,480
Income tax payable		44,449
Total current liabilities	196,770	96,194	141,791
Deferred underwriting commissions	12,075,000	12,075,000	12,075,000
Total liabilities	12,271,770	12,171,194	12,216,791
Commitments
Stockholders' Equity:
Preferred stock, value
Additional paid-in capital			5,215,674
Retained earnings	4,999,075	4,999,032	(216,687)
Total stockholders' equity	5,000,010	5,000,002	5,000,010
Total Liabilities and Stockholders' Equity	355,112,440	351,443,016	346,221,811
Class A Common Stock [Member]
Current liabilities:
Class A common stock, value	337,840,660	334,271,820	329,005,010
Stockholders' Equity:
Common stock, value	72	107	160
Total stockholders' equity	72	107	160
Class F Common Stock [Member]
Stockholders' Equity:
Common stock, value	863	863	863
Total stockholders' equity	$ 863	$ 863	$ 863

Condensed Balance Sheets (Paren

Condensed Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Preferred shares, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred shares, shares authorized	1,000,000	1,000,000	1,000,000
Preferred shares, shares issued	0	0	0
Preferred shares, shares outstanding	0	0	0
Class A Common Stock [Member]
Class A common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Shares subject to possible redemption	33,784,066	33,427,182	32,900,501
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000	200,000,000
Common stock, shares issued	715,934	1,072,818	1,599,499
Common stock, shares outstanding	715,934	1,072,818	1,599,499
Class F Common Stock [Member]
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	20,000,000	20,000,000	20,000,000
Common stock, shares issued	8,625,000	8,625,000	8,625,000
Common stock, shares outstanding	8,625,000	8,625,000	8,625,000

Condensed Statements of Operati

Condensed Statements of Operations - USD ($)	3 Months Ended		5 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
General and administrative expenses	$ 616,452	$ 157,497	$ 216,687	$ 981,702	$ 519,445	$ 871,091
Franchise tax expense	50,000			144,746		5,480
Loss from operations	(666,452)	(157,497)	(216,687)	(1,126,448)	(519,445)	(876,571)
Interest income	1,735,331	1,626,620		5,901,927	4,235,536	6,187,823
Income (loss) before income tax expense	1,068,879	1,469,123	(216,687)	4,775,479	3,716,091	5,311,252
Income tax expense	353,919			1,206,631		44,450
Net income (loss)	714,960	1,469,123	$ (216,687)	3,568,848	3,716,091	5,266,802
Class A Common Stock [Member]
Interest income						6,200,000
Net income (loss)	$ 955,000	$ 1,500,000		$ 3,800,000	$ 3,700,000	$ 5,400,000
Weighted average shares outstanding	34,500,000	34,500,000	34,500,000	34,500,000	34,500,000	34,500,000
Basic and diluted net income (loss) per share	$ 0.03	$ 0.04	$ 0	$ 0.11	$ 0.11	$ 0.16
Class F Common Stock [Member]
Weighted average shares outstanding	8,625,000	8,625,000	8,625,000	8,625,000	8,625,000	8,625,000
Basic and diluted net income (loss) per share	$ (0.03)	$ 0	$ (0.03)	$ (0.03)	$ 0	$ (0.01)

Condensed Statements of Changes

Condensed Statements of Changes in Shareholders' Equity - USD ($)	Total	Initial Public Offering [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Initial Public Offering [Member]	Retained Earnings (Accumulated Deficit) [Member]	Sponsors [Member]	Sponsors [Member]Additional Paid-in Capital [Member]	Class A Common Stock [Member]	Class A Common Stock [Member]Initial Public Offering [Member]	Class F Common Stock [Member]	Class F Common Stock [Member]Sponsors [Member]
Beginning Balance at Jul. 26, 2017	$ 0		$ 0		$ 0			$ 0		$ 0
Beginning Balance, shares at Jul. 26, 2017								0		0
Issuance of shares, value		$ 325,296,706		$ 325,293,256		$ 25,000	$ 24,137		$ 3,450		$ 863
Issuance of shares, shares									34,500,000		8,625,000
Sale of private placement warrants to Sponsor in private placement	8,900,001		8,900,001
Common stock subject to possible redemption	(329,005,010)		(329,001,720)					$ (3,290)
Common stock subject to possible redemption, shares								(32,900,501)
Net income (loss)	(216,687)				(216,687)
Ending Balance at Dec. 31, 2017	5,000,010		5,215,674		(216,687)			$ 160		$ 863
Ending Balance, shares at Dec. 31, 2017								1,599,499		8,625,000
Common stock subject to possible redemption	(958,379)		(958,369)					$ (10)
Common stock subject to possible redemption, shares								(95,838)
Net income (loss)	958,379				958,379
Ending Balance at Mar. 31, 2018	5,000,010		4,257,305		741,692			$ 150		$ 863
Ending Balance, shares at Mar. 31, 2018								1,503,661		8,625,000
Beginning Balance at Dec. 31, 2017	5,000,010		5,215,674		(216,687)			$ 160		$ 863
Beginning Balance, shares at Dec. 31, 2017								1,599,499		8,625,000
Net income (loss)	3,716,091							$ 3,700,000
Ending Balance at Sep. 30, 2018	5,000,001		1,499,611		3,499,404			$ 123		$ 863
Ending Balance, shares at Sep. 30, 2018								1,227,889		8,625,000
Beginning Balance at Dec. 31, 2017	5,000,010		5,215,674		(216,687)			$ 160		$ 863
Beginning Balance, shares at Dec. 31, 2017								1,599,499		8,625,000
Common stock subject to possible redemption	(5,266,810)		(5,266,757)					$ (53)
Common stock subject to possible redemption, shares								(526,681)
Reclassification of additional paid-in capital to retained earnings			51,083		(51,083)
Net income (loss)	5,266,802				5,266,802			$ 5,400,000
Ending Balance at Dec. 31, 2018	5,000,002				4,999,032			$ 107		$ 863
Ending Balance, shares at Dec. 31, 2018								1,072,818		8,625,000
Beginning Balance at Mar. 31, 2018	5,000,010		4,257,305		741,692			$ 150		$ 863
Beginning Balance, shares at Mar. 31, 2018								1,503,661		8,625,000
Common stock subject to possible redemption	(1,288,591)		(1,288,578)					$ (13)
Common stock subject to possible redemption, shares								(128,859)
Net income (loss)	1,288,589				1,288,589
Ending Balance at Jun. 30, 2018	5,000,008		2,968,727		2,030,281			$ 137		$ 863
Ending Balance, shares at Jun. 30, 2018								1,374,802		8,625,000
Common stock subject to possible redemption	(1,469,130)		(1,469,116)					$ (14)
Common stock subject to possible redemption, shares								(146,913)
Net income (loss)	1,469,123				1,469,123			$ 1,500,000
Ending Balance at Sep. 30, 2018	5,000,001		$ 1,499,611		3,499,404			$ 123		$ 863
Ending Balance, shares at Sep. 30, 2018								1,227,889		8,625,000
Beginning Balance at Dec. 31, 2018	5,000,002				4,999,032			$ 107		$ 863
Beginning Balance, shares at Dec. 31, 2018								1,072,818		8,625,000
Common stock subject to possible redemption	(1,378,000)				(1,377,987)			$ (13)
Common stock subject to possible redemption, shares								(137,800)
Net income (loss)	1,378,002				1,378,002
Ending Balance at Mar. 31, 2019	5,000,004				4,999,047			$ 94		$ 863
Ending Balance, shares at Mar. 31, 2019								935,018		8,625,000
Beginning Balance at Dec. 31, 2018	5,000,002				4,999,032			$ 107		$ 863
Beginning Balance, shares at Dec. 31, 2018								1,072,818		8,625,000
Net income (loss)	3,568,848							$ 3,800,000
Ending Balance at Sep. 30, 2019	5,000,010				4,999,075			$ 72		$ 863
Ending Balance, shares at Sep. 30, 2019								715,934		8,625,000
Beginning Balance at Mar. 31, 2019	5,000,004				4,999,047			$ 94		$ 863
Beginning Balance, shares at Mar. 31, 2019								935,018		8,625,000
Common stock subject to possible redemption	(1,475,880)				(1,475,865)			$ (15)
Common stock subject to possible redemption, shares								(147,588)
Net income (loss)	1,475,886				1,475,886
Ending Balance at Jun. 30, 2019	5,000,010				4,999,068			$ 79		$ 863
Ending Balance, shares at Jun. 30, 2019								787,430		8,625,000
Common stock subject to possible redemption	(714,960)				(714,953)			$ (7)
Common stock subject to possible redemption, shares								(71,496)
Net income (loss)	714,960				714,960			$ 955,000
Ending Balance at Sep. 30, 2019	$ 5,000,010				$ 4,999,075			$ 72		$ 863
Ending Balance, shares at Sep. 30, 2019								715,934		8,625,000

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows - USD ($)	5 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Cash Flows from Operating Activities:
Net income	$ (216,687)	$ 3,568,848	$ 3,716,091	$ 5,266,802
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Interest income from investments held in Trust Account		(5,901,927)	(4,235,536)	(6,187,823)
Changes in operating assets and liabilities:
Prepaid expenses	(293,423)	(48,629)	119,499	180,748
Accounts payable	93,876	(7,098)	(92,659)	(85,141)
Accrued expenses	5,000	5,000	(5,000)	(5,000)
Accrued expenses-related parties	42,915	2,603	(7,132)	(5,385)
Franchise tax payable		144,520		5,480
Income tax payable		(44,449)		44,449
Net cash used in operating activities	(368,319)	(2,281,132)	(504,737)	(785,870)
Cash Flows from Investing Activities
Interest released from Trust Account		2,075,290	562,750	750,000
Cash deposited in Trust Account	(345,000,000)
Net cash provided by (used in) investing activities	(345,000,000)	2,075,290	562,750	750,000
Cash Flows from Financing Activities
Proceeds from issuance of Class F common stock to Sponsors	25,000
Proceeds received under loan from related parties	100,000
Repayment of loan from related parties	(100,000)
Proceeds received from initial public offering, net of offering costs	337,371,706
Proceeds received from private placement	8,900,001
Net cash provided by financing activities	346,296,707
Net change in cash	928,388	(205,842)	58,013	(35,870)
Cash-beginning of the period		892,518	928,388	928,388
Cash-end of the period	928,388	686,676	986,401	892,518
Supplemental disclosure of noncash transactions:
Change in value of Class A common stock subject to possible redemption	329,005,010	3,568,840	$ 3,716,100	$ 5,266,810
Deferred underwriting commissions in connection with the initial public offering	$ 12,075,000
Supplemental cash flow disclosure:
Cash paid for income taxes		$ 1,368,127

Description of Organization and

Description of Organization and Business Operations	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Description of Organization and Business Operations	Note 1. Description of Organization and Business Operations Mosaic Acquisition Corp. (the “Company” or “Mosaic”) is a blank check company and was incorporated in the Cayman Islands on July 26, 2017. Effective December 21, 2018, the Company changed its jurisdiction of incorporation from Cayman Islands to the State of Delaware (“Domestication”). The Company was formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses that the Company has not yet identified (“Business Combination”). Although the Company is not limited to a particular industry or geographic region for purposes of consummating a Business Combination, the Company intends to capitalize on the ability of its management team to identify, acquire and operate a business that may provide opportunities for attractive risk-adjusted returns. All activity from July 26, 2017 (inception) through September 30, 2019 relates to the Company’s formation, completion of the initial public offering (“Initial Public Offering”), entering into forward purchase agreements, and, since the closing of the Initial Public Offering, the search for a Business Combination candidate described below. The registration statement for the Company’s Initial Public Offering was declared effective on October 18, 2017. On October 23, 2017, the Company consummated its Initial Public Offering of 34,500,000 units (“units”), including the issuance of 4,500,000 units as a result of the underwriters’ exercise of their over-allotment option in full, at $10.00 per unit, generating gross proceeds of $345 million and incurring offering costs of approximately $19.7 million, inclusive of $12.075 million in deferred underwriting commissions (Note 6). Simultaneously with the closing of the Initial Public Offering, the Company consummated the private placement (“private placement”) of 5,933,334 warrants (the “private placement warrants”), at a price of $1.50 per private placement warrant, with the Company’s sponsors, Mosaic Sponsor, LLC and Fortress Mosaic Sponsor LLC (each a “sponsor” and, together, the “sponsors”), generating gross proceeds of $8.9 million (Note 4). Upon the closing of the Initial Public Offering and private placement, $345 million ($10.00 per unit) of the aggregate net proceeds of the sale of the units in the Initial Public Offering and the Private Placement was placed in a U.S.-based trust account (“Trust Account”) at J.P. Morgan Chase Bank, N.A., maintained by Continental Stock Transfer & Trust Company, acting as trustee. Beginning in January 2018, the proceeds held in the Trust Account are invested in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act, with a maturity of 180 days or less or in any open-ended investment company that holds itself out as a money market fund selected by the Company meeting the conditions of paragraphs (d)(2), (d)(3) and (d)(4) of Rule 2a-7 The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of private placement warrants, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. There is no assurance that the Company will be able to complete a Business Combination successfully. The Company’s initial Business Combination must be with one or more target businesses that together have an aggregate fair market value of at least 80% of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on income earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination. However, the Company will only complete a Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act 1940, as amended, or the Investment Company Act. The Company will provide its holders of Class A common stock (“public stockholders”) with the opportunity to redeem all or a portion of their Class A common stock upon the completion of a business combination either (i) in connection with a stockholder meeting called to approve the business combination or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a business combination or conduct a tender offer will be made by the Company, solely in its discretion. If, however, stockholder approval of the transaction is required by law or stock exchange listing requirement, or the Company decides to obtain stockholder approval for business or other legal reasons, it will: (i) conduct the redemptions in conjunction with a proxy solicitation pursuant to Regulation 14A of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which regulates the solicitation of proxies, and not pursuant to the tender offer rules; and (ii) file proxy materials with the Securities and Exchange Commission (“SEC”). The public stockholders will be entitled to redeem their Class A common stock for a pro rata portion of the amount then in the Trust Account (initially approximately $10.00 per share) plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to fund working capital requirements, subject to an annual limit of $750,000, and/or to pay for the Company’s tax obligations. Since inception, the Company has withdrawn approximately $1.5 million for working capital and approximately $1.4 million for taxes obligations. The per-share In addition, certain institutional and accredited investors (“anchor investors”) have entered into forward purchase agreements with the Company, pursuant to which the anchor investors agreed to purchase an aggregate of 15,789,474 shares of Class A common stock, at a purchase price of $9.50 per share of Class A common stock (for an aggregate amount of approximately $150 million), in a private placement to occur concurrently with the closing of the initial business combination (“forward purchase agreements”). The obligations under the forward purchase agreements do not depend on whether any Class A common stock are redeemed by the public stockholders. In connection with these agreements, if the last reported sale price of the Class A common stock is less than $11.00 (as adjusted for share splits, share combinations and the like) for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the first anniversary of the initial business combination, each anchor investor may purchase from the sponsors, at a price per share of Class A common stock of $0.01, a number of Class A common stock (“contingent call shares”) no greater than (a) the number of forward purchase shares issued and sold to such anchor investor less any forward purchase shares sold by such anchor investor prior to its exercise of the right to purchase such contingent call shares divided by (b) 18 (as adjusted for share splits, share combinations and the like). Notwithstanding the foregoing, the Company’s certificate of incorporation provides that a public stockholder, together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13 of the Exchange Act), is restricted from redeeming its shares with respect to more than an aggregate of 15% or more of the Class A common stock sold in the Initial Public Offering, without the prior consent of the Company. The Company’s sponsors, officers and directors (the “initial stockholders”) agreed not to propose an amendment to the Company’s Memorandum and Articles of Association that would affect the substance or timing of the Company’s obligation to redeem 100% of its Class A common stock if the Company does not complete a business combination, unless the Company provides the public stockholders with the opportunity to redeem their Class A common stock in conjunction with any such amendment. The initial stockholders agreed to waive their liquidation rights with respect to the founder shares if the Company fails to complete a business combination within the Combination Period. However, if the initial stockholders should acquire Class A common stock in or after the Initial Public Offering, they will be entitled to liquidating distributions from the Trust Account with respect to such Class A common stock if the Company fails to complete a business combination within the Combination Period. The underwriters have agreed to waive their rights to their deferred underwriting commission (see Note 6) held in the Trust Account in the event the Company does not complete a business combination within the Combination Period and, in such event, such amounts will be included with the funds held in the Trust Account that will be available to fund the redemption of the Company’s Class A common stock. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be only $10.00 per share initially held in the Trust Account (or less than that in certain circumstances). In order to protect the amounts held in the Trust Account, the sponsors have agreed to be liable to the Company, jointly and severally, if and to the extent any claims by a vendor for services rendered or products sold to the Company, or a prospective target business with which the Company has discussed entering into a transaction agreement, reduce the amount of funds in the Trust Account. This liability will not apply with respect to any claims by a third party who executed a waiver of any right, title, interest or claim of any kind in or to any monies held in the Trust Account or to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). Moreover, in the event that an executed waiver is deemed to be unenforceable against a third party, the sponsors will not be responsible to the extent of any liability for such third-party claims. The Company will seek to reduce the possibility that the sponsors will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers (other than the Company’s independent auditors), prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. Pursuant to the Company’s certificate of incorporation, the Company originally had until 24 months from the closing of the Initial Public Offering (or October 23, 2019) to complete a business combination, or 27 months from the closing of the Initial Public Offering (or January 23, 2020) if the Company has executed a letter of intent, agreement in principle or definitive agreement for an initial business combination within 24 months from the closing of the Initial Public Offering. On September 15, 2019, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) by and among Mosaic, Maiden Merger Sub, Inc., a wholly owned subsidiary of Mosaic (“Merger Sub”), and Vivint Smart Home, Inc. (“Vivint Smart Home”) (see Note 9). As a result, the Company extended the time by which it must consummate a business combination until January 23, 2020 (the “Combination Period”). If the Company is unable to complete a business combination by the Combination Period, the Company will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but no more than ten business days thereafter, redeem 100% of the outstanding Class A common stock which redemption will completely extinguish public stockholders’ rights as stockholders (including the right to receive further liquidation distributions, if any), subject to applicable law and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining stockholders and the Company’s board of directors, proceed to commence a voluntary liquidation and thereby a formal dissolution of the Company, subject in each case to its obligations to provide for claims of creditors and the requirements of applicable law. Going Concern As of September 30, 2019, the Company had approximately $687,000 in its operating bank account, approximately $9.3 million of interest income from investments held in Trust Account available to fund working capital requirements (subject to an annual limit of $750,000, of which the Company already withdrew $561,500 during the nine months ended September 30, 2019) and/or to pay for the Company’s tax obligations, and working capital of approximately $651,000. In order to finance transaction costs in connection with a business combination, the sponsors or an affiliate of the sponsors, or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (“Working Capital Loans”) (see Note 5). In connection with the Company’s assessment of going concern considerations in accordance with the Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 2014-15,	Note 1. Description of Organization and Business Operations Mosaic Acquisition Corp. (the “Company”) is a blank check company and was incorporated in the Cayman Islands on July 26, 2017. Effective December 21, 2018, the Company changed its jurisdiction of incorporation from Cayman Islands to the State of Delaware (“Domestication”). The Company was formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses that the Company has not yet identified (“business combination”). Although the Company is not limited to a particular industry or geographic region for purposes of consummating a Business Combination, the Company intends to capitalize on the ability of its management team to identify, acquire and operate a business that may provide opportunities for attractive risk-adjusted returns. All activity from July 26, 2017 (inception) through December 31, 2018 relates to the Company’s formation, completion of the initial public offering (“Initial Public Offering”), entering into forward purchase agreements, and, since the closing of the Initial Public Offering, the search for a Business Combination candidate described below. The registration statement for the Company’s Initial Public Offering was declared effective on October 18, 2017. On October 23, 2017, the Company consummated its Initial Public Offering of 34,500,000 units (“units”), including the issuance of 4,500,000 units as a result of the underwriters’ exercise of their over-allotment option in full, at $10.00 per unit, generating gross proceeds of $345 million and incurring offering costs of approximately $19.7 million, inclusive of $12.075 million in deferred underwriting commissions (Note 6). Simultaneously with the closing of the Initial Public Offering, the Company consummated the private placement (“private placement”) of 5,933,334 warrants (the “private placement warrants”), at a price of $1.50 per private placement warrant, with the Company’s sponsors, Mosaic Sponsor, LLC and Fortress Mosaic Sponsor LLC (each a “sponsor” and, together, the “sponsors”), generating gross proceeds of $8.9 million (Note 4). Upon the closing of the Initial Public Offering and private placement, $345 million ($10.00 per unit) of the aggregate net proceeds of the sale of the units in the Initial Public Offering and the Private Placement was placed in a U.S.-based trust account (“Trust Account”) at J.P. Morgan Chase Bank, N.A., maintained by Continental Stock Transfer & Trust Company, acting as trustee. Beginning in January 2018, the proceeds held in the Trust Account are invested in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act, with a maturity of 180 days or less or in any open-ended investment company that holds itself out as a money market fund selected by the Company meeting the conditions of paragraphs (d)(2), (d)(3) and (d)(4) of Rule 2a-7 At December 31, 2018, the Company had approximately $893,000 in cash held outside of the Trust Account. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of private placement warrants, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. There is no assurance that the Company will be able to complete a Business Combination successfully. The Company’s initial Business Combination must be with one or more target businesses that together have an aggregate fair market value of at least 80% of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on income earned on the trust account) at the time of the agreement to enter into the initial Business Combination. However, the Company will only complete a Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act 1940, as amended, or the Investment Company Act. The Company will provide its holders of Class A common stock (“public stockholders”) with the opportunity to redeem all or a portion of their Class A common stock upon the completion of a business combination either (i) in connection with a stockholder meeting called to approve the business combination or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a business combination or conduct a tender offer will be made by the Company, solely in its discretion. If, however, stockholder approval of the transaction is required by law or stock exchange listing requirement, or the Company decides to obtain stockholder approval for business or other legal reasons, it will: (i) conduct the redemptions in conjunction with a proxy solicitation pursuant to Regulation 14A of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which regulates the solicitation of proxies, and not pursuant to the tender offer rules; and (ii) file proxy materials with the Securities and Exchange Commission (“SEC”). The public stockholders will be entitled to redeem their Class A common stock for a pro rata portion of the amount then in the trust account (initially approximately $10.00 per share) plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to fund working capital requirements, subject to an annual limit of $750,000, and/or to pay for the Company’s tax obligations. As of December 31, 2018, the Company has withdrawn an aggregate of approximately $750,000 of interest earned on funds held in Trust Account for working capital purposes. The per-share Topic 480 “Distinguishing Liabilities from Equity.” In such case, the Company will proceed with a business combination if the Company has net tangible assets of at least $5,000,001 upon such consummation of a business combination and a majority of the shares voted are voted in favor of the business combination. If a stockholder vote is not required by the law and the Company does not decide to hold a stockholder vote for business or other legal reasons, the Company will, pursuant to its certificate of incorporation, conduct the redemptions pursuant to the tender offer rules of the SEC, and file tender offer documents with the SEC prior to completing a business combination. If, however, a stockholder approval of the transactions is required by law, or the Company decides to obtain stockholder approval for business or legal reasons, the Company will offer to redeem shares in conjunction with a proxy solicitation pursuant to the proxy rules and not pursuant to the tender offer rules. Additionally, each public stockholder may elect to redeem their Class A common stock irrespective of whether they vote for or against the proposed transaction. If the Company seeks stockholder approval in connection with a business combination, the initial stockholders (as defined below) have agreed to vote their founder shares (as defined in Note 5) and any Class A common stock purchased during or after the Initial Public Offering in favor of a business combination. In addition, the initial stockholders have agreed to waive their redemption rights with respect to their founder shares and Class A common stock in connection with the completion of a business combination. In addition, certain institutional and accredited investors (“anchor investors”) have entered into forward purchase agreements with the Company, pursuant to which the anchor investors agreed to purchase an aggregate of 15,789,474 shares of Class A common stock, at a purchase price of $9.50 per share of Class A common stock (for an aggregate amount of approximately $150 million), in a private placement to occur concurrently with the closing of the initial business combination (“forward purchase agreements”). The obligations under the forward purchase agreements do not depend on whether any Class A common stock are redeemed by the public stockholders. In connection with these agreements, if the last reported sale price of the Class A common stock is less than $11.00 (as adjusted for share splits, share combinations and the like) for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the first anniversary of the initial business combination, each anchor investor may purchase from the sponsors, at a price per share of Class A common stock of $0.01, a number of Class A common stock (“contingent call shares”) no greater than (a) the number of forward purchase shares issued and sold to such anchor investor less any forward purchase shares sold by such anchor investor prior to its exercise of the right to purchase such contingent call shares divided by (b) 18 (as adjusted for share splits, share combinations and the like). Notwithstanding the foregoing, the Company’s certificate of incorporation provides that a public stockholder, together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13 of the Exchange Act), is restricted from redeeming its shares with respect to more than an aggregate of 15% or more of the Class A common stock sold in the Initial Public Offering, without the prior consent of the Company. The Company’s sponsors, officers and directors (the “initial stockholders”) agreed not to propose an amendment to the Company’s Memorandum and Articles of Association that would affect the substance or timing of the Company’s obligation to redeem 100% of its Class A common stock if the Company does not complete a business combination, unless the Company provides the public stockholders with the opportunity to redeem their Class A common stock in conjunction with any such amendment. If the Company is unable to complete a business combination within 24 months from the closing of the Initial Public Offering, or 27 months from the closing of the Initial Public Offering if the Company has executed a letter of intent, agreement in principle or definitive agreement for an initial business combination within 24 months from the closing of the Initial Public Offering (the “Combination Period”), the Company will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but no more than ten business days thereafter, redeem 100% of the outstanding Class A common stock which redemption will completely extinguish public stockholders’ rights as stockholders (including the right to receive further liquidation distributions, if any), subject to applicable law and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the remaining stockholders and the Company’s board of directors, proceed to commence a voluntary liquidation and thereby a formal dissolution of the Company, subject in each case to its obligations to provide for claims of creditors and the requirements of applicable law. In connection with the redemption of 100% of the Company’s outstanding Class A common stock for a portion of the funds held in the trust account, each holder will receive a full pro rata portion of the amount then in the trust account, plus any pro-rata The initial stockholders agreed to waive their liquidation rights with respect to the founder shares if the Company fails to complete a business combination within the combination period. However, if the initial stockholders should acquire Class A common stock in or after the Initial Public Offering, they will be entitled to liquidating distributions from the trust account with respect to such Class A common stock if the Company fails to complete a business combination within the combination period. The underwriters have agreed to waive their rights to their deferred underwriting commission (see Note 6) held in the Trust Account in the event the Company does not complete a business combination within the combination period and, in such event, such amounts will be included with the funds held in the trust account that will be available to fund the redemption of the Company’s Class A common stock. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including trust account assets) will be only $10.00 per share initially held in the trust account (or less than that in certain circumstances). In order to protect the amounts held in the trust account, the sponsors have agreed to be liable to the Company, jointly and severally, if and to the extent any claims by a vendor for services rendered or products sold to the Company, or a prospective target business with which the Company has discussed entering into a transaction agreement, reduce the amount of funds in the trust account. This liability will not apply with respect to any claims by a third party who executed a waiver of any right, title, interest or claim of any kind in or to any monies held in the trust account or to any claims under the Company’s indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). Moreover, in the event that an executed waiver is deemed to be unenforceable against a third party, the sponsors will not be responsible to the extent of any liability for such third-party claims. The Company will seek to reduce the possibility that the sponsors will have to indemnify the trust account due to claims of creditors by endeavoring to have all vendors, service providers (other than the Company’s independent auditors), prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the trust account. Liquidity and Going Concern As of December 31, 2018, the Company had approximately $893,000 in its operating bank account and working capital of approximately $909,000. In order to finance transaction costs in connection with a business combination, the sponsors or an affiliate of the sponsors, or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (“Working Capital Loans”) (see Note 5). In connection with the Company’s assessment of going concern considerations in accordance with the Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 2014-15,

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Basis of presentation The accompanying unaudited condensed financial statements have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the SEC. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP. In the opinion of management, all adjustments (consisting of normal accruals) considered for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for any future period. For further information, refer to the financial statements and footnotes thereto included in the Company’s 2018 10-K Emerging growth company The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart our Business Startups Act of 2012, (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. Further, section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging Use of estimates The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statements, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Accordingly, the actual results could differ significantly from those estimates. Income taxes The Company complies with the accounting and reporting requirements of Accounting Standards Codification (“ASC”) Topic 740, “ Income Taxes” ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not At September 30, 2019 and December 31, 2018, the Company had gross deferred tax assets related federal and state net operating loss carry forwards for income tax purposes of approximately $215,000 and $9,000, respectively. In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the period in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and taxing strategies in making this assessment. In case the deferred tax assets will not be realized in future periods, the Company has provided a valuation allowance for the full amount of the deferred tax assets at September 30, 2019 and December 31, 2018. Class A common stock subject to possible redemption The Company accounts for its Class A common stock subject to possible redemption in accordance with the guidance in ASC Topic 480 “ Distinguishing Liabilities from Equity Net Income (Loss) per Share of Common Stock The Company’s statement of operations includes a presentation of income per share for common stock subject to redemption in a manner similar to the two-class Net income per common stock, basic and diluted for Class A common stock for the three and nine months ended September 30, 2019 are calculated by dividing the interest income earned on the Trust Account, net of funds available to be withdrawn from the Trust Account for working capital (subject to an annual limit of $750,000) and tax payable purposes, resulted in a total of approximately $955,000 and $3.8 million, respectively, by the weighted average number of Class A common stock outstanding for the period. Net income per common stock, basic and diluted for Class A common stock for the three and nine months ended September 30, 2018 are calculated by dividing the interest income earned on the Trust Account, net of funds available to be withdrawn from the Trust Account for working capital (subject to an annual limit of $750,000) and tax payable purposes, resulted in a total of approximately $1.5 million and $3.7 million, respectively, by the weighted average number of Class A common stock outstanding for the period. Net income (loss) per common stock, basic and diluted for Class F common stock for the three and nine months ended September 30, 2019 and 2018 are calculated by dividing the net income, less income attributable to Class A common stock by the weighted average number of Class F common stock outstanding for the period. The Company complies with accounting and disclosure requirements of FASB ASC 260, “ Earnings Per Share Concentration of credit risk Financial instruments that potentially subject the Company to concentration of credit risk consist of a cash account in a financial institution which, at times may exceed the Federal Depository Insurance Corporation coverage of $250,000. At September 30, 2019 and December 31, 2018, the Company had not experienced losses on this account and management believes the Company is not exposed to significant risks on such account. Fair value of financial instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “ Fair Value Measurements and Disclosures Fair Value Measurements Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include: • Level 1, defined as observable inputs such as quoted prices (unadjusted) for identical instruments in active markets; • Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable such as quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active; and • Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions, such as valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. In some circumstances, the inputs used to measure fair value might be categorized within different levels of the fair value hierarchy. In those instances, the fair value measurement is categorized in its entirety in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement. Recent Accounting Pronouncements Management does not believe that any recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s financial statements.	Note 2. Summary of Significant Accounting Policies Basis of presentation The accompanying financial statement is presented in U.S. dollars in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the rules and regulations of the SEC. Emerging growth company The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart our Business Startups Act of 2012, (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. Further, section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging Use of estimates The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statements, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Accordingly, the actual results could differ significantly from those estimates. Income taxes The Company complies with the accounting and reporting requirements of Accounting Standards Codification (“ASC”) Topic 740, “Income Taxes,” ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not At December 31, 2018, the Company had gross deferred tax assets related federal and state net operating loss carry forwards for income tax purposes of approximately $9,000. In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the period in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and taxing strategies in making this assessment. In case the deferred tax assets will not be realized in future periods, the Company has provided a valuation allowance for the full amount of the deferred tax assets at December 31, 2018. Class A common stock subject to possible redemption The Company accounts for its Class A common stock subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity. Net Income (Loss) per Share The Company’s statement of operations includes a presentation of income per share for common stock subject to redemption in a manner similar to the two-class The Company complies with accounting and disclosure requirements of FASB ASC 260, “Earnings Per Share. Concentration of credit risk Financial instruments that potentially subject the Company to concentration of credit risk consist of a cash account in a financial institution which, at times may exceed the Federal Depository Insurance Corporation coverage of $250,000. At December 31, 2018 and 2017, the Company had not experienced losses on this account and management believes the Company is not exposed to significant risks on such account. Fair value of financial instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the accompanying balance sheets, primarily due to their short-term nature. Fair Value Measurements Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include: • Level 1, defined as observable inputs such as quoted prices (unadjusted) for identical instruments in active markets; • Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable such as quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active; and • Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions, such as valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. In some circumstances, the inputs used to measure fair value might be categorized within different levels of the fair value hierarchy. In those instances, the fair value measurement is categorized in its entirety in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement. Recent Accounting Pronouncements In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, 10-Q In July 2017, the FASB issued Accounting Standards Update (“ASU”) 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480) and Derivatives and Hedging (Topic 815): Part I. Accounting for Certain Financial Instruments with Down Round Features; Part II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception. Part I of this update addresses the complexity of accounting for certain financial instruments with down round features. Down round features are features of certain equity-linked instruments (or embedded features) that result in the strike price being reduced on the basis of the pricing of future equity offerings. Also, entities must adjust their basic Earnings Per Share (“EPS”) calculation for the effect of the down round provision when triggered (that is, when the exercise price of the related equity-linked financial instrument is adjusted downward because of the down round feature). That effect is treated as a dividend and as a reduction of income available to common shareholders in basic EPS. An entity will also recognize the effect of the trigger within equity. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company plans to adopt this guidance during the quarter ended March 31, 2019. The adoption of this guidance is not expected to have a material impact on the Company’s financial position, results of operations, cash flows or disclosures until a trigger event occurs. Part II of this update addresses the difficulty of navigating Topic 480, Distinguishing Liabilities from Equity, because of the existence of extensive pending content in the FASB Accounting Standards Codification. This pending content is the result of the indefinite deferral of accounting requirements about mandatorily redeemable financial instruments of certain nonpublic entities and certain mandatorily redeemable noncontrolling interests. The amendments in Part II of this update are not expected to have an impact on the Company. Management does not believe that any other recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s financial statements.

Initial Public Offering

Initial Public Offering	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Text Block [Abstract]
Initial Public Offering	Note 3. Initial Public Offering On October 23, 2017, the Company sold 34,500,000 units, including the issuance of 4,500,000 units as a result of the underwriters’ exercise of their over-allotment option in full, at a price of $10.00 per unit in the Initial Public Offering. Each unit consists of one share of Class A common stock and one-third	Note 3. Initial Public Offering On October 23, 2017, the Company sold 34,500,000 units, including the issuance of 4,500,000 units as a result of the underwriters’ exercise of their over-allotment option in full, at a price of $10.00 per unit in the Initial Public Offering. Each unit consists of one Class A common stock and one-third

Private Placement

Private Placement	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Text Block [Abstract]
Private Placement	Note 4. Private Placement Concurrently with the closing of the Initial Public Offering, the sponsors purchased an aggregate of 5,933,334 Private Placement Warrants, generating gross proceeds of $8.9 million in the aggregate in a Private Placement. Each Private Placement Warrant is exercisable to purchase one share of Class A common stock at $11.50 per share. A portion of the proceeds from the Private Placement Warrants were added to the proceeds from the Initial Public Offering held in the Trust Account. If the Company does not complete a Business Combination within the Combination Period, the Private Placement Warrants will expire worthless.	Note 4. Private Placement Concurrently with the closing of the Initial Public Offering, the Sponsors purchased an aggregate of 5,933,334 Private Placement Warrants, generating gross proceeds of $8.9 million in the aggregate in a Private Placement. Each Private Placement Warrant is exercisable to purchase one Class A common stock at $11.50 per share. A portion of the proceeds from the Private Placement Warrants were added to the proceeds from the Initial Public Offering held in the Trust Account. If the Company does not complete a Business Combination within the Combination Period, the Private Placement Warrants will expire worthless.

Related Party Transactions

Related Party Transactions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Note 5. Related Party Transactions Founder Shares On October 23, 2017, the Company issued an aggregate of 8,625,000 shares of Class F common stock to the sponsors (the “founder shares”) in exchange for an aggregate capital contribution of $25,000, with each sponsor purchasing an equal number of founder shares. The sponsors agreed to forfeit an aggregate of up to 1,125,000 founder shares to the extent that the over-allotment option is not exercised in full by the underwriters. On October 23, 2017, the underwriters exercised their over-allotment option. As a result, the 1,125,000 founder shares were no longer subject to forfeiture. The founder shares will automatically convert into Class A common stock upon the consummation of a business combination, or earlier at the option of the holder, on a one-for-one The initial stockholders agreed not to transfer, assign or sell any of their founder shares until the earliest of (a) one year after the completion of the initial business combination, (b) subsequent to the initial business combination, if the last reported sale price of the Class A common stock equals or exceeds $12.00 per share (as adjusted) for any 20 trading days within any 30-trading Forward Purchase Agreements The Company entered into forward purchase agreements with anchor investors (including an affiliate of Fortress Mosaic Sponsor LLC), pursuant to which the anchor investors agreed to purchase an aggregate of 15,789,474 shares of Class A common stock at a purchase price of $9.50 multiplied by the number of shares of Class A common stock purchased (“forward purchase shares”), or approximately $150,000,000 in the aggregate, in a private placement to occur concurrently with the closing of the initial business combination. In connection with the forward purchase shares sold to the anchor investors, the sponsors will receive (by way of an adjustment to their existing founder shares) an aggregate number of additional founder shares equal to one ninth of the aggregate number of forward purchase shares sold to the anchor investors. If the last reported sale price of the Class A common stock is less than $11.00 (as adjusted for share splits, share combinations and the like) for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the first anniversary of the Company’s initial business combination, each anchor investor may purchase from the sponsors, at a price per Class A common stock of $0.01, a number of Class A common stock no greater than (a) the number of forward purchase shares issued and sold to such anchor investor less any forward purchase shares sold by such anchor investor prior to its exercise of the right to purchase such contingent call shares divided by (b) 18 (as adjusted for share splits, share combinations and the like). The forward purchase agreements also provided that the anchor investors are entitled to a right of first offer with respect to any proposed sale of additional equity or equity-linked securities by the Company for capital raising purposes in connection with the closing of the initial business combination (other than forward purchase shares) and registration rights with respect to their forward purchase securities. The forward purchase agreements provided that prior to our initial business combination each anchor investor has the right to designate one individual to be, at its election, either elected as a member of our board of directors or a non-voting The proceeds from the sale of the forward purchase shares may be used as part of the consideration to the sellers in the initial business combination, expenses in connection with the initial business combination or for working capital in the post-transaction company. These purchases will be required to be made regardless of whether any Class A common stock are redeemed by the public stockholders and are intended to provide the Company with a minimum funding level for the initial business combination. The anchor investors will have no right to the funds held in the Trust Account except with respect to any public shares owned by them. Office Space and Related Support Services Effective October 18, 2017, the Company entered into an agreement with an affiliate of one of the sponsors a monthly fee of $16,875 for office space and related support services. On October 18, 2017, the Company agreed to pay a monthly fee of $5,000 for its Chief Financial Officer (“CFO”) commencing on the closing of the Initial Public Offering, plus a deferred cash payment of $330 per hour, less cumulative monthly fees paid, payable upon completion of its initial business combination or liquidation, whichever occurs first. In addition, the Company also agreed to pay its CFO according to the agreement for services performed prior to the closing of the Initial Public Offering. Any deferred cash payment will not be claimed against the Trust Account. Additionally, the Company will issue Class A common stock to him upon completion of the Company’s initial business combination (“Equity Compensation”). The number of Class A common stock to be issued is determined in accordance with an agreed formula, which is estimated to be 8,683 shares as of September 30, 2019. The Company is not obligated to issue the Equity Compensation if no Business Combination is consummated. The equity compensation fee is an unrecognized contingent liability, as closing of a potential business combination was not considered probable as of September 30, 2019. During the three months ended September 30, 2019 and 2018, the Company incurred approximately $71,000 and $60,000, respectively, for services provided by related parties in connection with these aforementioned agreements, as reflected in the accompanying unaudited condensed statements of operations. During the nine months ended September 30, 2019 and 2018, the Company incurred approximately $199,000 and $190,000, respectively, for services provided by related parties in connection with these aforementioned agreements, as reflected in the accompanying unaudited condensed statements of operations. Related Party Loans In order to finance transaction costs in connection with a business combination, the sponsors or an affiliate of either sponsor, or certain of our officers and directors may, but are not obligated to, provide Working Capital Loans to the Company as may be required. If the Company completes a business combination, the Company would repay the Working Capital Loans out of the proceeds of the Trust Account released to the Company. Otherwise, the Working Capital Loans would be repaid only out of funds held outside the Trust Account. In the event that a business combination does not close, the Company may use a portion of proceeds held outside the Trust Account to repay the Working Capital Loans but no proceeds held in the Trust Account would be used to repay the Working Capital Loans, other than the interest on such proceeds that may be released for working capital purposes. Except for the foregoing, the terms of such Working Capital Loans, if any, have not been determined and no written agreements exist with respect to such loans. The Working Capital Loans would either be repaid upon consummation of a business combination, without interest, or, at the lender’s discretion, up to $1,500,000 of such Working Capital Loans may be convertible into warrants of the post business combination entity at a price of $1.50 per warrant. The warrants would be identical to the private placement warrants. There were no Working Capital Loans outstanding as of September 30, 2019 and December 31, 2018.	Note 5. Related Party Transactions Founder Shares On October 23, 2017, the Company issued an aggregate of 8,625,000 shares of Class F common stock to the sponsors (the “founder shares”) in exchange for an aggregate capital contribution of $25,000, with each sponsor purchasing an equal number of founder shares. The sponsors agreed to forfeit an aggregate of up to 1,125,000 founder shares to the extent that the over-allotment option is not exercised in full by the underwriters. On October 23, 2017, the underwriters exercised their over-allotment option. As a result, the 1,125,000 founder shares were no longer subject to forfeiture. The founder shares will automatically convert into Class A common stock upon the consummation of a business combination, or earlier at the option of the holder, on a one-for-one The initial stockholders agreed not to transfer, assign or sell any of their founder shares until the earliest of (a) one year after the completion of the initial business combination, (b) subsequent to the initial business combination, if the last reported sale price of the Class A common stock equals or exceeds $12.00 per share (as adjusted) for any 20 trading days within any 30-trading Forward Purchase Agreements The Company entered into forward purchase agreements with anchor investors (including an affiliate of Fortress Mosaic Sponsor LLC), pursuant to which the anchor investors agreed to purchase an aggregate of 15,789,474 shares of Class A common stock at a purchase price of $9.50 multiplied by the number of shares of Class A common stock purchased (“forward purchase shares”), or approximately $150,000,000 in the aggregate, in a private placement to occur concurrently with the closing of the initial business combination. In connection with the forward purchase shares sold to the anchor investors, the sponsors will receive (by way of an adjustment to their existing founder shares) an aggregate number of additional founder shares equal to one ninth of the aggregate number of forward purchase shares sold to the anchor investors. If the last reported sale price of the Class A common stock is less than $11.00 (as adjusted for share splits, share combinations and the like) for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the first anniversary of the Company’s initial business combination, each anchor investor may purchase from the sponsors, at a price per Class A common stock of $0.01, a number of Class A common stock no greater than (a) the number of forward purchase shares issued and sold to such anchor investor less any forward purchase shares sold by such anchor investor prior to its exercise of the right to purchase such contingent call shares divided by (b) 18 (as adjusted for share splits, share combinations and the like). The forward purchase agreements also provided that the anchor investors are entitled to a right of first offer with respect to any proposed sale of additional equity or equity-linked securities by the Company for capital raising purposes in connection with the closing of the initial business combination (other than forward purchase shares) and registration rights with respect to their forward purchase securities. The forward purchase agreements provided that prior to our initial business combination each anchor investor has the right to designate one individual to be, at its election, either elected as a member of our board of directors or a non-voting The proceeds from the sale of the forward purchase shares may be used as part of the consideration to the sellers in the initial business combination, expenses in connection with the initial business combination or for working capital in the post-transaction company. These purchases will be required to be made regardless of whether any Class A common stock are redeemed by the public stockholders and are intended to provide the Company with a minimum funding level for the initial business combination. The anchor investors will have no right to the funds held in the trust account except with respect to any public shares owned by them. Office Space and Related Support Services Effective October 18, 2017, the Company entered into an agreement with an affiliate of one of the sponsors a monthly fee of $16,875 for office space and related support services. On October 18, 2017, the Company agreed to pay a monthly fee of $5,000 for its Chief Financial Officer (“CFO”) commencing on the closing of the Initial Public Offering, plus a deferred cash payment of $330 per hour, less cumulative monthly fees paid, payable upon completion of its initial business combination or liquidation, whichever occurs first. In addition, the Company also agreed to pay its CFO according to the agreement for services performed prior to the closing of the Initial Public Offering. Any deferred cash payment will not be claimed against the trust account. Additionally, the Company will issue Class A common stock to him upon completion of the Company’s initial business combination (“Equity Compensation”). The number of Class A common stock to be issued is determined in accordance with an agreed formula, which is estimated to be 6,110 shares as of December 31, 2018. The Company is not obligated to issue the Equity Compensation if no Business Combination is consummated. The equity compensation fee is an unrecognized contingent liability, as closing of a potential business combination was not considered probable as of December 31, 2018. The Company had incurred $257,000 and $58,000 in expenses during the year ended December 31, 2018 and for the period from July 26, 2017 (inception) through December 31, 2017, respectively, as reflected in the accompanying Statements of Operations for services provided by related parties in connection with these aforementioned agreements with related parties. An aggregate of approximately $37,500 and $43,000 in fees for these services was accrued as of December 31, 2018 and 2017, respectively, as reflected in the accompanying balance sheets. Related Party Loans In order to finance transaction costs in connection with a business combination, the sponsors or an affiliate of either sponsor, or certain of our officers and directors may, but are not obligated to, provide Working Capital Loans to the Company as may be required. If the Company completes a business combination, the Company would repay the Working Capital Loans out of the proceeds of the trust account released to the Company. Otherwise, the Working Capital Loans would be repaid only out of funds held outside the trust account. In the event that a business combination does not close, the Company may use a portion of proceeds held outside the trust account to repay the Working Capital Loans but no proceeds held in the trust account would be used to repay the Working Capital Loans, other than the interest on such proceeds that may be released for working capital purposes. Except for the foregoing, the terms of such Working Capital Loans, if any, have not been determined and no written agreements exist with respect to such loans. The Working Capital Loans would either be repaid upon consummation of a business combination, without interest, or, at the lender’s discretion, up to $1,500,000 of such Working Capital Loans may be convertible into warrants of the post business combination entity at a price of $1.50 per warrant. The warrants would be identical to the private placement warrants. There were no Working Capital Loans outstanding as of December 31, 2018 and 2017.

Commitments & Contingencies

Commitments & Contingencies	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments & Contingencies	Note 6. Commitments & Contingencies Registration Rights The holders of the founder shares and private placement warrants and warrants that may be issued upon conversion of Working Capital Loans (and any Class A common stock issuable upon the exercise of the private placement warrants and warrants that may be issued upon conversion of Working Capital Loans) will be entitled to registration rights pursuant to a registration rights agreement to be signed prior to or on the effective date of the Initial Public Offering. The holders of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to the consummation of a business combination. However, the registration rights agreement provides that the Company will not permit any registration statement filed under the Securities Act to become effective until termination of the applicable lock-up Pursuant to the forward purchase agreements, the Company agreed to file within 30 days after the closing of the business combination a registration statement for a secondary offering of the forward purchase shares and contingent call shares and to maintain the effectiveness of such registration statement until the earliest of (A) the date on which the anchor investors cease to hold the securities covered thereby, (B) the date all of the securities covered thereby can be sold publicly without restriction or limitation under Rule 144 under the Securities Act, subject to certain conditions and limitations set forth in the forward purchase agreements. Underwriting Agreement The Company granted the underwriters a 45-day The underwriters were entitled to an underwriting discount of $0.20 per unit, or $6.9 million in the aggregate, paid upon the closing of the Initial Public Offering. Additionally, a deferred underwriting discount of $0.35 per unit, or $12.075 million in the aggregate will be 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.	Note 6. Commitments & Contingencies Registration Rights The holders of the founder shares and private placement warrants and warrants that may be issued upon conversion of Working Capital Loans (and any Class A common stock issuable upon the exercise of the private placement warrants and warrants that may be issued upon conversion of Working Capital Loans) will be entitled to registration rights pursuant to a registration rights agreement to be signed prior to or on the effective date of the Initial Public Offering. The holders of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to the consummation of a business combination. However, the registration rights agreement provides that the Company will not permit any registration statement filed under the Securities Act to become effective until termination of the applicable lock-up Pursuant to the forward purchase agreements, the Company agreed to file within 30 days after the closing of the business combination a registration statement for a secondary offering of the forward purchase shares and contingent call shares and to maintain the effectiveness of such registration statement until the earliest of (A) the date on which the anchor investors cease to hold the securities covered thereby, (B) the date all of the securities covered thereby can be sold publicly without restriction or limitation under Rule 144 under the Securities Act, subject to certain conditions and limitations set forth in the forward purchase agreements. Underwriting Agreement The Company granted the underwriters a 45-day The underwriters were entitled to an underwriting discount of $0.20 per unit, or $6.9 million in the aggregate, paid upon the closing of the Initial Public Offering. Additionally, a deferred underwriting discount of $0.35 per unit, or $12.075 million in the aggregate will be 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.

Stockholders' Equity

Stockholders' Equity	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Equity [Abstract]
Stockholders' Equity	Note 7. Stockholders’ Equity Class A Common Stock— Class F Common Stock— one-for-one Holders of the founder shares will have the right to elect all of the Company’s directors prior to the initial business combination and each director will need to receive the vote of two-thirds Founder shares will automatically convert into Class A common stock on the first business day following the consummation of the initial business combination, or earlier at the option of the holders, on a one-for-one two-thirds Preferred Stock— Warrants— The private placement warrants are identical to the warrants underlying the units sold in the Initial Public Offering, except that the private placement warrants and the Class A common stock issuable upon exercise of the private placement warrants will not be transferable, assignable or salable until 30 days after the completion of a business combination, subject to certain limited exceptions. Additionally, the private placement warrants will be non-redeemable The Company may call the warrants for redemption: 1. For cash: • in whole and not in part; • at a price of $0.01 per warrant; • upon a minimum of 30 days’ prior written notice of redemption; and • if, and only if, the last reported closing price of the common stock equals or exceeds $18.00 per share (as adjusted for share splits, share dividends, reorganizations, reclassifications, recapitalizations and the like) for any 20 trading days within a 30-trading 2. For Class A common stock: • in whole and not in part; • at a price equal to a number of Class A common stock to be determined by reference to a table included in the warrant agreement, based on the redemption date and the fair market value of the Class A common stock; • upon a minimum of 30 days’ prior written notice of redemption; and • if, and only if, the last reported closing price of the common stock equals or exceeds $10.00 per share (as adjusted for share splits, share dividends, reorganizations, reclassifications, recapitalizations and the like) on the trading day prior to the date on which the Company sends notice of redemption to the warrant holders. If the Company calls the warrants for redemption, management will have the option to require all holders that wish to exercise the warrants to do so on a “cashless basis,” as described in the warrant agreement. The exercise price and number of Class A common stock issuable upon exercise of the warrants may be adjusted in certain circumstances including in the event of a share dividend, or recapitalization, reorganization, merger or consolidation. However, the warrants will not be adjusted for issuance of Class A common stock at a price below its exercise price. Additionally, in no event will the Company be required to net cash settle the warrants shares. If the Company is unable to complete a business combination within the Combination Period and the Company liquidates the funds held in the Trust Account, holders of warrants will not receive any of such funds with respect to their warrants, nor will they receive any distribution from the Company’s assets held outside of the Trust Account with the respect to such warrants. In such a situation, the warrants would expire worthless.	Note 7. Stockholders’ Equity Class A Common Stock—The Class F Common Stock—The one-for-one Holders of the founder shares will have the right to elect all of the Company’s directors prior to the initial business combination and each director will need to receive the vote of two-thirds Founder shares will automatically convert into Class A common stock on the first business day following the consummation of the initial business combination, or earlier at the option of the holders, on a one-for-one two-thirds Preferred stock—The Warrants—Warrants The private placement warrants are identical to the warrants underlying the units sold in the Initial Public Offering, except that the private placement warrants and the Class A common stock issuable upon exercise of the private placement warrants will not be transferable, assignable or salable until 30 days after the completion of a business combination, subject to certain limited exceptions. Additionally, the private placement warrants will be non-redeemable The Company may call the warrants for redemption: 1. For cash: • in whole and not in part; • at a price of $0.01 per warrant; • upon a minimum of 30 days’ prior written notice of redemption; and • if, and only if, the last reported closing price of the common stock equals or exceeds $18.00 per share (as adjusted for share splits, share dividends, reorganizations, reclassifications, recapitalizations and the like) for any 20 trading days within a 30-trading 2. For Class A common stock: • in whole and not in part; • at a price equal to a number of Class A common stock to be determined by reference to a table included in the warrant agreement, based on the redemption date and the fair market value of the Class A common stock; • upon a minimum of 30 days’ prior written notice of redemption; and • if, and only if, the last reported closing price of the common stock equals or exceeds $10.00 per share (as adjusted for share splits, share dividends, reorganizations, reclassifications, recapitalizations and the like) on the trading day prior to the date on which the Company sends notice of redemption to the warrant holders. If the Company calls the warrants for redemption, management will have the option to require all holders that wish to exercise the warrants to do so on a “cashless basis,” as described in the warrant agreement. The exercise price and number of Class A common stock issuable upon exercise of the warrants may be adjusted in certain circumstances including in the event of a share dividend, or recapitalization, reorganization, merger or consolidation. However, the warrants will not be adjusted for issuance of Class A common stock at a price below its exercise price. Additionally, in no event will the Company be required to net cash settle the warrants shares. If the Company is unable to complete a business combination within the combination period and the Company liquidates the funds held in the trust account, holders of warrants will not receive any of such funds with respect to their warrants, nor will they receive any distribution from the Company’s assets held outside of the trust account with the respect to such warrants. In such a situation, the warrants would expire worthless.

Fair Value Measurements

Fair Value Measurements	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 8. Fair Value Measurements The following table presents information about the Company’s assets that are measured on a recurring basis as of September 30, 2019 and December 31, 2018 and indicates the fair value hierarchy of the valuation techniques that the Company utilized to determine such fair value. September 30, 2019 Description Quoted Prices Significant Significant Investments held in Trust Account $ 354,264,460 $ — $ — December 31, 2018 Description Quoted Prices Significant Significant Investments held in Trust Account $ 350,437,823 $ — $ — None of the balance in the Trust Account was held in cash as of September 30, 2019 and December 31, 2018.	Note 8. Fair Value Measurements The following table presents information about the Company’s assets that are measured on a recurring basis as of December 31, 2018 and indicates the fair value hierarchy of the valuation techniques that the Company utilized to determine such fair value. Quoted Prices Significant Significant in Active Observable Unobservable Description (Level 1) (Level 2) (Level 3) Cash and investments held in Trust Account $ 350,437,823 $ — $ — None of the balance in the Trust Account was held in cash as of December 31, 2018. As of December 31, 2017, the total balance of $345,000,000 in the Trust Account was held in cash.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Note 9. Subsequent Events The Company evaluated subsequent events and transactions that occurred after the balance sheet date up to the date that the financial statements were available to be issued.

Merger Agreement

Merger Agreement	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Merger Agreement	Note 9. Merger Agreement Pursuant to the terms of the Merger Agreement, a business combination between Mosaic and Vivint Smart Home will be effected through the merger of Merger Sub with and into Vivint Smart Home, with Vivint Smart Home surviving as the surviving company (the “Merger”). At the effective time of the Merger (the “Effective Time”), each stockholder of Vivint Smart Home will receive 209.6849221312 shares of Mosaic’s Class A common stock, par value $0.0001 per share (the “Common Stock”) for each share of Vivint Smart Home common stock, par value $0.01 per share (“Vivint common stock”), that such stockholder owns. Pursuant to the terms of the Merger Agreement, Mosaic is required to use reasonable best efforts to cause the Common Stock to be issued in connection with the transactions contemplated by the Merger Agreement (the “Transactions”) to be listed on the New York Stock Exchange (“NYSE”) prior to the closing of the Merger (the “Closing”). Certain investment funds managed by affiliates of Fortress Investment Group LLC (“Fortress”) and certain investment funds affiliated with The Blackstone Group Inc. (“Blackstone”) have agreed to purchase, respectively, 12,500,000 and 10,000,000 newly-issued shares of Common Stock (such purchases, the “Fortress Subscription” and the “Blackstone Subscription”, respectively, and together, the “Subscriptions”) concurrently with the completion of the Merger. Following the Merger, cash proceeds are expected to be used to repay certain of Vivint Smart Home’s existing indebtedness, including its senior notes due 2020. The consummation of the proposed Transactions is subject to the receipt of the requisite approval of the stockholders of each of Mosaic and Vivint Smart Home (such approvals, the “Mosaic stockholder approval” and the “Vivint Smart Home stockholder approval”, respectively) and the fulfillment of certain other conditions Representations and Warranties The Merger Agreement contains customary representations and warranties of the parties thereto with respect to, among other things, (a) entity organization, formation and authority, (b) capital structure, (c) authorization to enter into the Merger Agreement, (d) licenses and permits, (e) taxes, (f) financial statements, (g) real property, (h) material contracts, (i) title to assets, (j) absence of changes, (k) employee matters, (l) compliance with laws, (m) litigation, (n) transactions with affiliates and (o) regulatory matters. Covenants The Merger Agreement includes customary covenants of the parties with respect to operation of the business prior to consummation of the Transactions and efforts to satisfy conditions to consummation of the Transactions. The Merger Agreement also contains additional covenants of the parties, including, among others, (a) covenants providing for Mosaic and Vivint Smart Home to use reasonable best efforts to obtain all necessary regulatory approvals, (b) covenants providing for Mosaic, Merger Sub and Vivint Smart Home to cooperate in the preparation of the Registration Statement and Proxy Statement (as each such terms are defined in the Merger Agreement) required to be filed in connection with the Transactions and (c) covenants providing for Mosaic and Vivint Smart Home to use commercially reasonable efforts to ensure that funds held by Mosaic at the Closing be used to repay Vivint Smart Home’s outstanding indebtedness. Earnout Following the Closing, holders of Vivint common stock and holders of Rollover Restricted Stock (as defined in the Merger Agreement) and outstanding Rollover Equity Awards (as defined in the Merger Agreement) will have the contingent right to receive, in the aggregate, up to 25,000,000 shares of Common Stock if, from the Closing until the fifth anniversary thereof, the dollar volume-weighted average price of Common Stock exceeds certain thresholds (as further described in the Merger Agreement). Mosaic Omnibus Incentive Plan Prior to the Closing, Mosaic will adopt the Acquiror Omnibus Incentive Plan (as defined in the Merger Agreement) subject to the receipt of the Mosaic stockholder approval. Vivint Smart Home Non-Solicitation Restrictions Except as expressly permitted by the Merger Agreement, from the date of the Merger Agreement to the Effective Time or, if earlier, the valid termination of the Merger Agreement in accordance with its terms, Vivint Smart Home has agreed not to, among other things, initiate, solicit or knowingly encourage or knowingly facilitate any inquiries or requests for information with respect to, or the making of, any inquiry regarding, or any proposal or offer that constitutes, or could reasonably be expected to result in or lead to, any Acquisition Proposal (as defined in the Merger Agreement). Prior to the receipt of the Vivint Smart Home stockholder approval, the Vivint Smart Home board of directors may, among other things, (a) change its recommendation that the Vivint Smart Home stockholders adopt the Merger Agreement or (b) pay the termination fee described below and terminate the Merger Agreement to enter into a definitive acquisition agreement providing for a Superior Proposal (as defined in the Merger Agreement), subject to the conditions set forth in the Merger Agreement including, Mosaic’s board of directors concluding, in consultation with its financial advisor(s) and outside legal counsel, that the failure to take such action would be inconsistent with its fiduciary duties under applicable law. Mosaic Exclusivity Restrictions From the date of the Merger Agreement to the Effective Time or, if earlier, the valid termination of the Merger Agreement in accordance with its terms, to the extent not inconsistent with Mosaic’s board of directors’ fiduciary duties, Mosaic has agreed not to, among other things, solicit, initiate, continue or engage in discussions or negotiations with, or enter into any agreement with, or encourage, respond, provide information to or commence due diligence with respect to, any person (other than Vivint Smart Home, its stockholders or any of their affiliates or representatives), concerning, relating to or which is intended or is reasonably likely to give rise to or result in any Business Combination (as defined in the Merger Agreement) other than with Vivint Smart Home, its stockholders and their affiliates or representatives. Mosaic Change in Recommendation Mosaic is required to use its reasonable best efforts to include in the Proxy Statement the recommendation of Mosaic’s board of directors to Mosaic’s stockholders that they approve the transaction proposals (the “Mosaic board recommendation”). Mosaic is permitted to change the Mosaic Board Recommendation (such change, a “change in recommendation”) if it determines, in good faith, after consultation with its outside legal counsel, that the failure to make such a change in recommendation would be inconsistent with its fiduciary duties under applicable law. Conditions to Closing General Conditions Consummation of the proposed transactions is conditioned on Mosaic having at least $5,000,001 of net tangible assets (as determined in accordance with Rule 3a51-1(g)(1) of In addition, the consummation of the Merger is conditioned upon, among other things, (i) the expiration or termination of the waiting period under the Hart-Scott-Rodino Act, (ii) the absence of any governmental order, statute, rule or regulation enjoining or prohibiting the consummation of the Transactions, (iii) the completion of the redemption offer in relation to Common Stock in accordance with the terms of the Merger Agreement and the Proxy Statement, (iv) receipt of the Mosaic stockholder approval, (v) receipt of the Vivint Smart Home stockholder approval and (vi) the receipt of the approval for listing by the New York Stock Exchange of the Common Stock to be issued in connection with the Transactions. Mosaic’s Conditions to Closing The obligations of Mosaic to consummate the Merger are also conditioned upon, among other things, customary closing conditions and the consummation of the Blackstone Subscription. Vivint Smart Home’s Conditions to Closing The obligations of Vivint Smart Home to consummate the Merger also are conditioned upon, among other things, (i) customary closing conditions, (ii) the amendment and restatement of Mosaic’s certificate of incorporation in the form attached to the Merger Agreement, (iii) stockholders of Common Stock having requested redemption for fewer than 10,350,000 shares in the aggregate of Common Stock, (iv) the consummation of the Fortress Subscription, (v) the consummation of the transactions contemplated by those certain Forward Purchase Agreements, each dated as of September 26, 2017, by and among Mosaic and the other parties thereto and (vi) the completion of the transactions contemplated to occur with or prior to the Closing pursuant to the Sponsor Agreement (as defined below). Waivers If permitted under applicable law, either Mosaic or Vivint Smart Home may waive in writing any inaccuracies in the representations and warranties made to such party contained in the Merger Agreement or in any document delivered pursuant to the Merger Agreement and waive compliance with any agreements or conditions for the benefit of itself or such party contained in the Merger Agreement or in any document delivered pursuant to the Merger Agreement. Notwithstanding the foregoing, pursuant to Mosaic’s current certificate of incorporation, Mosaic cannot consummate the proposed transaction if it has less than $5,000,001 of net tangible assets (as determined in accordance with Rule 3a51-1(g)(1) of Termination The Merger Agreement may be terminated at any time, but not later than the Closing, as follows: (i) by mutual written consent of Mosaic and Vivint Smart Home; (ii) by either Mosaic or Vivint Smart Home if the other party has breached any of its covenants or representations and warranties (or, in the case of Mosaic, certain breaches on the part of 313 Acquisition of the Support Agreement (each as defined below)) such that closing conditions would not be satisfied at the Closing (subject to a thirty-day (iii) by either Mosaic or Vivint Smart Home if the transactions are not consummated on or before January 22, 2020 (or April 23, 2020, if stockholders of Common Stock have approved the deadline for Mosaic to consummate its initial Business Combination), provided that such right to termination will not be available to a party if such party’s failure to fulfill any of its obligations under the Merger Agreement has been the primary cause of the failure of the Closing to occur by such date; (iv) by either Mosaic or Vivint Smart Home if a governmental entity shall have issued a final, non-appealable (v) by either Mosaic or Vivint Smart Home if the Mosaic stockholder approval is not obtained at the Mosaic special stockholder meeting; (vi) by written notice from Vivint Smart Home prior to obtaining the Vivint Smart Home stockholder approval, in order for Vivint Smart Home to enter into a Superior Proposal (subject to the relevant terms and conditions of the Merger Agreement); or (vii) by written notice from Mosaic if Vivint Smart Home’s board of directors (A) change its recommendation that the Vivint Smart Home stockholders adopt the Merger Agreement, or (B) fail to include its recommendation that the Vivint Smart Home stockholders adopt the Merger Agreement in the consent solicitation statement distributed to Vivint Smart Home stockholders. In the event the Merger Agreement is terminated in accordance with the termination rights set forth in items (vi) and (vii) above, then Mosaic shall be entitled to receive a termination fee in the amount of $81,060,000. Sponsor Agreement In connection with the execution of the Merger Agreement, the sponsors and Eugene I. Davis (together with the sponsors, the “Sponsor Agreement Parties”) entered into an amendment to the existing sponsor agreement (as amended, the “Sponsor Agreement”) with Mosaic and Vivint Smart Home pursuant to which the Sponsor Agreement Parties have agreed to vote all shares of Common Stock beneficially owned by such persons in favor of each of the proposals at the Mosaic special stockholder meeting, to use their reasonable best efforts to take all actions reasonably necessary to consummate the Merger and the other transactions contemplated by the Merger Agreement and to not take any action that would reasonable be expected to materially delay or prevent the satisfaction of the conditions to the Merger set forth in the Merger Agreement. Pursuant to the Sponsor Agreement, prior to the valid termination of the Merger Agreement, each Sponsor Agreement Party is subject to certain non-solicitation restrictions The Sponsor Agreement provides that the Sponsor Agreement Parties will not redeem any shares of Common Stock owned by such persons in connection with the Merger and will take all actions necessary to opt out of any class in any class action with respect to any claim, derivative or otherwise, against Mosaic, Vivint Smart Home or any of their respective successors and assigns relating to the negotiation, execution or delivery of the Sponsor Agreement, the Merger Agreement or the consummation of the transactions contemplated in such agreements. The Sponsor Agreement Parties have also agreed, subject to the Stockholders Agreement (described below) and subject to certain exceptions, not to transfer any Founder Shares (as defined in the Sponsor Agreement) (or any shares of Common Stock issuable upon conversion thereof) or any Private Placement Warrants (as defined in the Sponsor Agreement) (or any shares of Common Stock issuable upon exercise thereof) until the earlier of (A) one year after the completion of the Merger, (B) subsequent to the Merger, if the last sale price of Common Stock equals or exceeds $12.00 per share (as adjusted for share splits, share dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day (the “Lock-up Period”). The Sponsor Agreement also provides that all the Founder Shares (and any shares of Common Stock issuable upon conversion thereof) and Private Placement Warrants held by each Sponsor Agreement Party as of the Closing shall be unvested and shall be subject to certain time and performance-based vesting provisions described below. The Sponsor Agreement Parties have agreed not to transfer any unvested Founder Shares or Private Placement Warrants prior to the date such securities become vested. Pursuant to the Sponsor Agreement, 50% of the unvested Founder Shares shall vest at the closing of the Merger. 25% of the unvested Founder Shares shall vest at such time as a $12.50 Stock Price Level (as defined below) is achieved on or before the fifth anniversary of the Closing. The remaining 25% of unvested Founder Shares shall vest at such time as a $15.00 Stock Price Level is achieved on or before the fifth anniversary of the Closing. 50% of the unvested Private Placement Warrants shall vest at such time as a $12.50 Stock Price Level is achieved on or before the fifth anniversary of the Closing. The remaining 50% of the unvested Private Placement Warrants shall vest at such time as a $15.00 Stock Price Level is achieved on or before the fifth anniversary of the Closing. In the event Mosaic enters into a binding agreement on or before the fifth anniversary of the Closing related to certain sale transactions involving the shares of Common Stock or all or substantially all the assets of Mosaic (a “Mosaic Sale”), all unvested Founder Shares and unvested Private Placement Warrants shall vest on the day prior to the closing of such Mosaic Sale if the per share price implied in such Mosaic Sale meets or exceeds the applicable Stock Price Level. Any Founder Shares or Private Placement Warrants that remain unvested after the fifth anniversary of the Closing shall be forfeited. The applicable “Stock Price Level” will be considered achieved only (a) when the volume weighted average price of Common Stock on the New York Stock Exchange is greater than or equal to the applicable threshold for any 20 trading days within a 30 trading day period or (b) the per share price implied in a Mosaic Sale is greater than or equal to the applicable threshold. The Sponsor Agreement shall terminate on the earlier of (a) the consummation of a Mosaic Sale and (b) the later of (i) the earlier of (x) the achievement of a $15.00 Stock Price Level on or before the fifth anniversary of the Closing and (y) the fifth anniversary of the Closing and (ii) the expiration of the Lock-up Period. Support Agreement In connection with the execution of the Merger Agreement, Mosaic, Merger Sub and 313 Acquisition LLC (“313 Acquisition”), which holds Vivint Smart Home common stock representing approximately 92% of the voting power of Vivint Smart Home common stock and preferred stock, entered into a support agreement (the “Support Agreement”), providing, among other things, that on (or effective as of) the third business day following the date that the consent solicitation statement/prospectus included in the Registration Statement is disseminated to Vivint Smart Home’s stockholders, 313 Acquisition will execute and deliver a written consent with respect to the outstanding shares of Vivint Smart Home common stock held by 313 Acquisition adopting the Merger Agreement and approving the Merger, unless the Merger is no longer recommended by the Vivint Smart Home board of directors in accordance with the Merger Agreement, in which case, 313 Acquisition would vote a number of shares equal to 35% of the shares of Vivint Smart Home stock approving the Merger and is entitled, in its sole discretion, to vote its remaining shares in any manner. The shares of Vivint Smart Home common stock that are owned by 313 Acquisition and subject to the Support Agreement represent approximately 92% of the outstanding voting power of Vivint Smart Home common stock and preferred stock. In addition, the Support Agreement prohibits 313 Acquisition from engaging in activities that have the effect of soliciting a competing acquisition proposal. Stockholders Agreement In connection with the execution of the Merger Agreement, Mosaic entered into a stockholders agreement (the “Stockholders Agreement”) with the sponsors, Blackstone and certain other parties thereto (collectively, the “Stockholder Parties”). The Stockholders Agreement will become effective upon the consummation of the Merger. Pursuant to the terms of the Stockholders Agreement, Blackstone will have the right to designate nominees for election to Mosaic’s board of directors following the Closing at any meeting of its stockholders (each, a “Blackstone Director”). The number of nominees that Blackstone will be entitled to nominate pursuant to the Stockholders Agreement is dependent on Blackstone’s beneficial ownership of Common Stock. For so long as Blackstone and their affiliates own (i) 50% or more of the Common Stock, Blackstone will be entitled to designate a majority of Mosaic’s directors, (ii) 40% to 50% of the Common Stock, Blackstone will be entitled to designate 40% of Mosaic’s directors, (iii) 30% (but less than 40%) of the Common Stock, Blackstone will be entitled to designate 30% of Mosaic’s directors, (iv) 20% (but less than 30%) of the Common Stock, Blackstone will be entitled to designate 20% of Mosaic’s directors and (v) 5% (but less than 20%) of the Common Stock, Blackstone will be entitled to designate 10% of Mosaic’s directors. Under the Stockholders Agreement, Mosaic agreed to nominate one director designated by Fortress (the “Fortress Director”) to Mosaic’s board of directors so long as Fortress beneficially owns at least 50% of the shares of Mosaic’s Common Stock it owns immediately following the consummation of the Merger; provided that the Fortress Director must be an employee or principal of the Softbank Vision Fund unless otherwise agreed by Mosaic and Blackstone. Additionally, so long as Fortress beneficially owns at least 50% of the shares of Mosaic’s common stock it owns immediately following the consummation of the Merger, Fortress shall have the right to appoint a representative (the “Fortress Observer”) who will have the right to attend meetings of Mosaic’s board of directors and receive information given to Mosaic’s directors, subject to certain customary exceptions, including to preserve confidentiality obligations or privilege. The Fortress Observer will not have any voting rights. Under the Stockholders Agreement, Mosaic agreed to nominate one director designated by the Summit Designator (as defined in the Stockholders Agreement) (the “Summit Director” and together with the Blackstone Directors and the Fortress Director, the “Stockholder Directors”) to Mosaic’s board of directors so long as the Summit Holders (as defined in the Stockholders Agreement) beneficially own at least 50% of the shares of Mosaic’s Common Stock they own immediately following the consummation of the Merger. Additionally, so long as the Summit Holders beneficially owns at least 50% of the shares of Mosaic’s common stock they own immediately following the consummation of the Merger, the Summit Holders shall have the right to appoint a representative (the “Summit Observer”) who will have the right to attend meetings of Mosaic’s board of directors and receive information given to Summit’s directors, subject to certain customary exceptions, including to preserve confidentiality obligations or privilege. The Summit Observer will not have any voting rights. In the case of a vacancy on Mosaic’s board created by the removal or resignation of a Stockholder Director, Mosaic agreed to nominate an individual designated by Blackstone or Fortress, as applicable, for election to fill the vacancy. Confidentiality and Lockup Agreements In addition, pursuant to certain Confidentiality and Lockup Agreements (the “Confidentiality and Lockup Agreements”), certain stockholders have agreed that they will not, during the period beginning on the effective time of the Merger and continuing to and including the date that is (i) in the case of 313 Acquisition, six months after the date of Closing, (ii) in the case of the Pedersen Holders, Dunn Holders, Summit Holders and Black Horse Holders (each as defined in the Stockholders Agreement), two years after the date of Closing and (iii) for all other Stockholder Parties, one year after the date of Closing, directly or indirectly, offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose of any shares of Common Stock, or any options or warrants to purchase any shares of Common Stock, or any securities convertible into, exchangeable for or that represent the right to receive shares of Common Stock, or any interest in any of the foregoing (in each case, subject to certain exceptions set forth in the Confidentiality and Lockup Agreements). The Confidentiality and Lockup Agreements will become effective upon the consummation of the Merger. Registration Rights Agreement In connection with the execution of the Merger Agreement, Vivint Smart Home, Mosaic, 313 Acquisition and certain significant stockholders of Mosaic entered into a registration rights agreement (“Registration Rights Agreement”). The Registration Rights Agreement will become effective upon the consummation of the Merger. Under the Registration Rights Agreement, following the consummation of the Merger Mosaic agreed to provide to 313 Acquisition an unlimited number of “demand” registration rights and to provide to other stockholders customary “piggyback” registration rights. The Registration Rights Agreement also provides that Mosaic will pay certain expenses relating to such registrations and indemnify the registration rights holders against (or make contributions in respect of) certain liabilities which may arise under the Securities Act. Support and Services Agreement In connection with the execution of the Merger Agreement, Mosaic, a subsidiary of Vivint Smart Home and Blackstone Management Partners L.L.C. (“BMP”), an affiliate of Blackstone, entered into an amended and restated support and services agreement (as amended, the “Support and Services Agreement”), which amends and restates and existing agreement between Vivint Smart Home and BMP. The Support and Services Agreement will become effective upon the consummation of the Merger. Pursuant to the Support and Services Agreement, BMP has been engaged to provide, directly or indirectly, monitoring, advisory and consulting services that may be requested by Vivint Smart Home in the following areas: (1) advice regarding the structure, distribution and timing of debt and equity offerings and advice regarding relationships with Vivint Smart Home’s lenders and bankers, (2) advice regarding the structuring and implementation of equity participation plans, employee benefit plans and other incentive arrangements for certain of Vivint Smart Home’s key executives, (3) general advice regarding dispositions and/or acquisitions, (4) advice regarding the strategic direction of Vivint Smart Home’s business and (5) such other advice directly related or ancillary to the above advisory services as may be reasonably requested by Vivint Smart Home. In exchange for these services, Vivint Smart Home will pay an annual monitoring fee to BMP of 1% of consolidated EBITDA until upon the earlier of (1) the completion of Vivint Smart Home’s fiscal year ended December 31, 2021 or (2) the date upon which Blackstone owns less than 5% of the voting power of all of the shares of capital stock entitled to vote generally in the election of directors of Vivint Smart Home or its direct or indirect controlling parent, and such stake has a fair market value (as determined by Blackstone) of less than $25 million. Additionally, under the Support and Services Agreement, BMP will make available to Vivint Smart Home its portfolio operations group to provide support services customarily provided by Blackstone’s portfolio operations group to Blackstone’s private equity portfolio companies of a type and amount determined by such portfolio services group it its sole discretion to be warranted and appropriate. BMP may, at any time, choose not to provide any such services. Such services will be provided without charge, other than for the reimbursement of related out-of-pocket expenses Subscription Agreements In connection with the execution of the Merger Agreement, each of Fortress and Blackstone entered into the Subscription Agreements pursuant to which each of Fortress and Blackstone have respectively subscribed for 12,500,000 and 10,000,000 newly-issued shares of Common Stock to be issued at the Closing. The obligations to consummate the Subscriptions are conditioned upon, among other things, customary closing conditions and the consummation of the transactions contemplated by the Merger Agreement.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation The accompanying unaudited condensed financial statements have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the SEC. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP. In the opinion of management, all adjustments (consisting of normal accruals) considered for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for any future period. For further information, refer to the financial statements and footnotes thereto included in the Company’s 2018 10-K	Basis of presentation The accompanying financial statement is presented in U.S. dollars in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the rules and regulations of the SEC.
Emerging growth company	Emerging growth company The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart our Business Startups Act of 2012, (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. Further, section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging	Emerging growth company The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart our Business Startups Act of 2012, (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. Further, section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging
Use of estimates	Use of estimates The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statements, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Accordingly, the actual results could differ significantly from those estimates.	Use of estimates The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statements, which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Accordingly, the actual results could differ significantly from those estimates.
Income taxes	Income taxes The Company complies with the accounting and reporting requirements of Accounting Standards Codification (“ASC”) Topic 740, “ Income Taxes” ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not At September 30, 2019 and December 31, 2018, the Company had gross deferred tax assets related federal and state net operating loss carry forwards for income tax purposes of approximately $215,000 and $9,000, respectively. In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the period in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and taxing strategies in making this assessment. In case the deferred tax assets will not be realized in future periods, the Company has provided a valuation allowance for the full amount of the deferred tax assets at September 30, 2019 and December 31, 2018.	Income taxes The Company complies with the accounting and reporting requirements of Accounting Standards Codification (“ASC”) Topic 740, “Income Taxes,” ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not At December 31, 2018, the Company had gross deferred tax assets related federal and state net operating loss carry forwards for income tax purposes of approximately $9,000. In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the period in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and taxing strategies in making this assessment. In case the deferred tax assets will not be realized in future periods, the Company has provided a valuation allowance for the full amount of the deferred tax assets at December 31, 2018.
Class A common stock subject to possible redemption	Class A common stock subject to possible redemption The Company accounts for its Class A common stock subject to possible redemption in accordance with the guidance in ASC Topic 480 “ Distinguishing Liabilities from Equity	Class A common stock subject to possible redemption The Company accounts for its Class A common stock subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity.
Net Income (Loss) per Share	Net Income (Loss) per Share of Common Stock The Company’s statement of operations includes a presentation of income per share for common stock subject to redemption in a manner similar to the two-class Net income per common stock, basic and diluted for Class A common stock for the three and nine months ended September 30, 2019 are calculated by dividing the interest income earned on the Trust Account, net of funds available to be withdrawn from the Trust Account for working capital (subject to an annual limit of $750,000) and tax payable purposes, resulted in a total of approximately $955,000 and $3.8 million, respectively, by the weighted average number of Class A common stock outstanding for the period. Net income per common stock, basic and diluted for Class A common stock for the three and nine months ended September 30, 2018 are calculated by dividing the interest income earned on the Trust Account, net of funds available to be withdrawn from the Trust Account for working capital (subject to an annual limit of $750,000) and tax payable purposes, resulted in a total of approximately $1.5 million and $3.7 million, respectively, by the weighted average number of Class A common stock outstanding for the period. Net income (loss) per common stock, basic and diluted for Class F common stock for the three and nine months ended September 30, 2019 and 2018 are calculated by dividing the net income, less income attributable to Class A common stock by the weighted average number of Class F common stock outstanding for the period. The Company complies with accounting and disclosure requirements of FASB ASC 260, “ Earnings Per Share	Net Income (Loss) per Share The Company’s statement of operations includes a presentation of income per share for common stock subject to redemption in a manner similar to the two-class The Company complies with accounting and disclosure requirements of FASB ASC 260, “Earnings Per Share.
Concentration of credit risk	Concentration of credit risk Financial instruments that potentially subject the Company to concentration of credit risk consist of a cash account in a financial institution which, at times may exceed the Federal Depository Insurance Corporation coverage of $250,000. At September 30, 2019 and December 31, 2018, the Company had not experienced losses on this account and management believes the Company is not exposed to significant risks on such account.	Concentration of credit risk Financial instruments that potentially subject the Company to concentration of credit risk consist of a cash account in a financial institution which, at times may exceed the Federal Depository Insurance Corporation coverage of $250,000. At December 31, 2018 and 2017, the Company had not experienced losses on this account and management believes the Company is not exposed to significant risks on such account.
Fair value of financial instruments	Fair value of financial instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “ Fair Value Measurements and Disclosures Fair Value Measurements Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include: • Level 1, defined as observable inputs such as quoted prices (unadjusted) for identical instruments in active markets; • Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable such as quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active; and • Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions, such as valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. In some circumstances, the inputs used to measure fair value might be categorized within different levels of the fair value hierarchy. In those instances, the fair value measurement is categorized in its entirety in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement.	Fair value of financial instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the accompanying balance sheets, primarily due to their short-term nature. Fair Value Measurements Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include: • Level 1, defined as observable inputs such as quoted prices (unadjusted) for identical instruments in active markets; • Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable such as quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active; and • Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions, such as valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. In some circumstances, the inputs used to measure fair value might be categorized within different levels of the fair value hierarchy. In those instances, the fair value measurement is categorized in its entirety in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Management does not believe that any recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s financial statements.	Recent Accounting Pronouncements In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, 10-Q In July 2017, the FASB issued Accounting Standards Update (“ASU”) 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480) and Derivatives and Hedging (Topic 815): Part I. Accounting for Certain Financial Instruments with Down Round Features; Part II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception. Part I of this update addresses the complexity of accounting for certain financial instruments with down round features. Down round features are features of certain equity-linked instruments (or embedded features) that result in the strike price being reduced on the basis of the pricing of future equity offerings. Also, entities must adjust their basic Earnings Per Share (“EPS”) calculation for the effect of the down round provision when triggered (that is, when the exercise price of the related equity-linked financial instrument is adjusted downward because of the down round feature). That effect is treated as a dividend and as a reduction of income available to common shareholders in basic EPS. An entity will also recognize the effect of the trigger within equity. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company plans to adopt this guidance during the quarter ended March 31, 2019. The adoption of this guidance is not expected to have a material impact on the Company’s financial position, results of operations, cash flows or disclosures until a trigger event occurs. Part II of this update addresses the difficulty of navigating Topic 480, Distinguishing Liabilities from Equity, because of the existence of extensive pending content in the FASB Accounting Standards Codification. This pending content is the result of the indefinite deferral of accounting requirements about mandatorily redeemable financial instruments of certain nonpublic entities and certain mandatorily redeemable noncontrolling interests. The amendments in Part II of this update are not expected to have an impact on the Company. Management does not believe that any other recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s financial statements.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Fair Value Measurements Measured on Recurring Basis	The following table presents information about the Company’s assets that are measured on a recurring basis as of September 30, 2019 and December 31, 2018 and indicates the fair value hierarchy of the valuation techniques that the Company utilized to determine such fair value. September 30, 2019 Description Quoted Prices Significant Significant Investments held in Trust Account $ 354,264,460 $ — $ — December 31, 2018 Description Quoted Prices Significant Significant Investments held in Trust Account $ 350,437,823 $ — $ —	The following table presents information about the Company’s assets that are measured on a recurring basis as of December 31, 2018 and indicates the fair value hierarchy of the valuation techniques that the Company utilized to determine such fair value. Quoted Prices Significant Significant in Active Observable Unobservable Description (Level 1) (Level 2) (Level 3) Cash and investments held in Trust Account $ 350,437,823 $ — $ —

Description of Organization a_2

Description of Organization and Business Operations - Additional Information (Detail) - USD ($)	Oct. 23, 2017	Dec. 31, 2017	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2019
Organization And Business Operations [Line Items]
Net proceeds from sale of units		$ 337,371,706
Warrants price per share			$ 1.50	$ 1.50	$ 1.50
Trust account	$ 345,000,000
Minimum percentage of fair market value of business acquisition to assets in trust account			80.00%	80.00%
Minimum percentage of outstanding voting securities to be acquired for completion of business combination			50.00%	50.00%
Cash		$ 928,388	$ 686,676	$ 892,518	$ 686,676
Annual limit of interest released to fund working capital requirements			750,000	750,000
Proceeds From Withdrawal From Funds Held In Trust For Working Capital Requirement			561,500	750,000	1,500,000
Minimum net tangible assets to complete business combination			$ 5,000,001	$ 5,000,001	5,000,001
Percentage of aggregate common shares that may be redeemed without prior consent			15.00%	15.00%
Maximum interest to pay dissolution expenses				$ 100,000
Interest earned from funds held in trust account for working capital purposes			$ 9,300,000	750,000
Working capital			$ 651,000	$ 909,000	651,000
Location of incorporation			KY
Date of incorporation			Jul. 26, 2017
Proceeds From Withdrawal From Funds Held In Trust For Tax Obligation					$ 1,400,000
Maximum [Member]
Organization And Business Operations [Line Items]
Period from closing of public offering to complete business combination			27 months	27 months
Minimum [Member]
Organization And Business Operations [Line Items]
Period from closing of public offering to complete business combination			24 months	24 months
Sponsors [Member] | Private Placement [Member]
Organization And Business Operations [Line Items]
Number of private placement warrants issued	5,933,334		5,933,334	5,933,334	5,933,334
Warrants price per share	$ 1.50
Proceeds from sale of private placement warrants to sponsors	$ 8,900,000		$ 8,900,000	$ 8,900,000
U.S. Government Securities [Member] | Maximum [Member]
Organization And Business Operations [Line Items]
Debt instrument, maturity period	180 days
Class A Common Stock [Member]
Organization And Business Operations [Line Items]
Net proceeds from sale of units	$ 345,000,000
Offering costs incurred	19,700,000
Deferred underwriting commissions	$ 12,075,000		$ 12,075,000
Initial redemption price			$ 10	$ 10
Percentage of public shares required to repurchase if business combination is not completed within specified period			100.00%	100.00%
Class A Common Stock [Member] | Initial Public Offering [Member]
Organization And Business Operations [Line Items]
Sale of units	34,500,000	34,500,000
Price per share	$ 10
Class A Common Stock [Member] | Over-Allotment Option [Member]
Organization And Business Operations [Line Items]
Sale of units	4,500,000
Class A Common Stock [Member] | Anchor Investors [Member]
Organization And Business Operations [Line Items]
Shares to be sold under forward agreements			15,789,474	15,789,474
Forward agreements price per share			$ 9.50	$ 9.50
Forward agreements, aggregate amount			$ 150,000,000	$ 150,000,000	$ 150,000,000
Class A Common Stock [Member] | Anchor Investors [Member] | Contingent Call Shares [Member]
Organization And Business Operations [Line Items]
Threshold share price			$ 11	$ 11
Number of trading days for calculating share price			20 days	20 days
Number of consecutive trading days for calculating share price			30 days	30 days
Share purchase price			$ 0.01	$ 0.01	$ 0.01

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended						5 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Net operating loss carry forwards for income tax	$ 215,000							$ 215,000		$ 9,000
Interest income earned on trust account	1,735,331			$ 1,626,620				5,901,927	$ 4,235,536	6,187,823
Net of funds available to be withdrawn from trust for working capital purposes	750,000			750,000				750,000	750,000	750,000
Net income	714,960	$ 1,475,886	$ 1,378,002	1,469,123	$ 1,288,589	$ 958,379	$ (216,687)	3,568,848	3,716,091	5,266,802
Federal depository insurance coverage	$ 250,000							$ 250,000		$ 250,000
Class A Common Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares subject to possible redemption	33,784,066						32,900,501	33,784,066		33,427,182
Interest income earned on trust account										$ 6,200,000
Net income	$ 955,000			$ 1,500,000				$ 3,800,000	$ 3,700,000	$ 5,400,000
Class A Common Stock [Member] | Private Placement [Member]
Summary Of Significant Accounting Policies [Line Items]
Securities excluded from the calculation of basic loss per ordinary share								17,433,334	17,433,334	17,433,334
Cayman Islands Tax Information Authority [Member]
Summary Of Significant Accounting Policies [Line Items]
Unrecognized tax benefits	0						$ 0	$ 0		$ 0
Accrued for interest and penalties	$ 0						$ 0	$ 0		$ 0

Initial Public Offering - Addit

Initial Public Offering - Additional Information (Detail) - Class A Common Stock [Member] - $ / shares	Oct. 23, 2017	Dec. 31, 2017
Initial Public Offering [Member]
Initial Public Offering [Line Items]
Sale of units	34,500,000	34,500,000
Share unit price per share	$ 10
Number of shares in each unit	1
Number of redeemable warrants in each unit	0.3333
Warrant exercise price per share	$ 11.50
Over-Allotment Option [Member]
Initial Public Offering [Line Items]
Sale of units	4,500,000

Private Placement - Additional

Private Placement - Additional Information (Detail) - Private Placement [Member] - Sponsors [Member] - USD ($) $ / shares in Units, $ in Millions	Oct. 23, 2017	Sep. 30, 2019	Dec. 31, 2018
Private Placement [Line Items]
Number of private placement warrants issued	5,933,334	5,933,334	5,933,334
Proceeds from sale of private placement warrants to sponsors	$ 8.9	$ 8.9	$ 8.9
Class A Common Stock [Member]
Private Placement [Line Items]
Number of shares called by each warrant		1	1
Private placement shares issued price per share		$ 11.50	$ 11.50

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	Oct. 23, 2017	Oct. 18, 2017	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Accrued expenses - related parties			$ 40,133		$ 42,915	$ 40,133		$ 37,530
Warrants price per share			$ 1.50			$ 1.50		$ 1.50
Working capital loans			$ 0		0	$ 0		$ 0
Warrant [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Loans convertible into warrants			1,500,000			1,500,000		1,500,000
Sponsors [Member]
Related Party Transaction [Line Items]
Stock issued during period, value, new issues					25,000
Total expenses - related parties					58,000			257,000
Accrued expenses - related parties					$ 43,000			$ 37,500
Total expenses - related parties			$ 71,000	$ 60,000		$ 199,000	$ 190,000
Sponsors [Member] | Chief Financial Officer [Member]
Related Party Transaction [Line Items]
Monthly fee payable		$ 5,000
Deferred cash payment per hour		330
Sponsor agreement [Member]
Related Party Transaction [Line Items]
Monthly expense for office space and related support services to an affiliate		$ 16,875
Class F Common Stock [Member]
Related Party Transaction [Line Items]
Common stock conversion basis ratio			100.00%			100.00%		100.00%
Class F Common Stock [Member] | Sponsors [Member]
Related Party Transaction [Line Items]
Stock issued during period, shares, new issues	8,625,000				8,625,000
Stock issued during period, value, new issues	$ 25,000				$ 863
Number of shares to be forfeited if over-allotment option is not exercised	1,125,000
Common stock conversion basis ratio			100.00%			100.00%		100.00%
Ratio of shares to be received as adjustment to existing shares						11.11%		11.11%
Class A Common Stock [Member] | Sponsors [Member]
Related Party Transaction [Line Items]
Threshold share price for transfer of shares						$ 12		$ 12
Number of trading period for transfer of shares						20 years		20 days
Number of consecutive trading period for transfer of shares						30 years		30 days
Period from completion of business combination						150 years		150 days
Class A Common Stock [Member] | Sponsors [Member] | Chief Financial Officer [Member]
Related Party Transaction [Line Items]
Ordinary shares to be issued			8,683			8,683		6,110
Class A Common Stock [Member] | Anchor Investors [Member]
Related Party Transaction [Line Items]
Shares to be sold under forward agreements						15,789,474		15,789,474
Forward agreements price per share						$ 9.50		$ 9.50
Forward agreements, aggregate amount						$ 150,000,000		$ 150,000,000
Class A Common Stock [Member] | Anchor Investors [Member] | Contingent Call Shares [Member]
Related Party Transaction [Line Items]
Threshold share price						$ 11		$ 11
Number of trading days for calculating share price						20 days		20 days
Number of consecutive trading days for calculating share price						30 days		30 days
Share purchase price			$ 0.01			$ 0.01		$ 0.01

Commitments & Contingencies - A

Commitments & Contingencies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Oct. 23, 2017	Sep. 30, 2019	Dec. 31, 2018
Other Commitments [Line Items]
Description of registration rights		Pursuant to the forward purchase agreements, the Company agreed to file within 30 days after the closing of the business combination a registration statement for a secondary offering of the forward purchase shares and contingent call shares and to maintain the effectiveness of such registration statement until the earliest of (A) the date on which the anchor investors cease to hold the securities covered thereby, (B) the date all of the securities covered thereby can be sold publicly without restriction or limitation under Rule 144 under the Securities Act, subject to certain conditions and limitations set forth in the forward purchase agreements.	Pursuant to the forward purchase agreements, the Company agreed to file within 30 days after the closing of the business combination a registration statement for a secondary offering of the forward purchase shares and contingent call shares and to maintain the effectiveness of such registration statement until the earliest of (A) the date on which the anchor investors cease to hold the securities covered thereby, (B) the date all of the securities covered thereby can be sold publicly without restriction or limitation under Rule 144 under the Securities Act, subject to certain conditions and limitations set forth in the forward purchase agreements.
Class A Common Stock [Member]
Other Commitments [Line Items]
Underwriters option period		45 days	45 days
Underwriter option to purchase additional shares		4,500,000	4,500,000
Payment for underwriting discount per unit	$ 0.20	$ 0.20
Payment for underwriting discount	$ 6,900	$ 6,900
Deferred underwriting discount per unit	$ 0.35	$ 0.35
Deferred underwriting commissions	$ 12,075	$ 12,075

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Preferred shares, authorized	1,000,000	1,000,000	1,000,000
Preferred shares, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred shares, issued	0	0	0
Preferred shares, outstanding	0	0	0
Warrant exercise period	The warrants will become exercisable on the later of (a) 30 days after the completion of a business combination or (b) 12 months from the closing of the Initial Public Offering	The warrants will become exercisable on the later of (a) 30 days after the completion of a business combination or (b) 12 months from the closing of the Initial Public Offering
Description of registration rights	Pursuant to the forward purchase agreements, the Company agreed to file within 30 days after the closing of the business combination a registration statement for a secondary offering of the forward purchase shares and contingent call shares and to maintain the effectiveness of such registration statement until the earliest of (A) the date on which the anchor investors cease to hold the securities covered thereby, (B) the date all of the securities covered thereby can be sold publicly without restriction or limitation under Rule 144 under the Securities Act, subject to certain conditions and limitations set forth in the forward purchase agreements.	Pursuant to the forward purchase agreements, the Company agreed to file within 30 days after the closing of the business combination a registration statement for a secondary offering of the forward purchase shares and contingent call shares and to maintain the effectiveness of such registration statement until the earliest of (A) the date on which the anchor investors cease to hold the securities covered thereby, (B) the date all of the securities covered thereby can be sold publicly without restriction or limitation under Rule 144 under the Securities Act, subject to certain conditions and limitations set forth in the forward purchase agreements.
Warrants expiration period after business combination	5 years	5 years
Period from completion of the business combination private placement warrants be transferred, assigned or sold	30 days	30 days
Redemption price per warrant	$ 0.01	$ 0.01
Warrants period of notice prior to redemption	30 days	30 days
Share price to be attained for redemption	$ 18	$ 18
Number of trading days	20 days	20 days
Number of consecutive trading days	30 days	30 days
Warrant [Member]
Class of Stock [Line Items]
Description of registration rights	The Company has agreed that as soon as practicable, but in no event later than 15 business days, after the closing of a business combination, the Company will use its best efforts to file with the SEC a registration statement for the registration, under the Securities Act, of the Class A common stock issuable upon exercise of the warrants. The Company will use its best efforts to cause the same to become effective and to maintain the effectiveness of such registration statement, and a current prospectus relating thereto, until the expiration of the warrants in accordance with the provisions of the warrant agreement. If a registration statement covering the Class A common stock issuable upon exercise of the warrants is not effective by the sixtieth (60th) day after the closing of the initial business combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company will have failed to maintain an effective registration statement, exercise warrants on a "cashless basis" in accordance with Section 3(a)(9) of the Securities Act or another exemption.	The Company has agreed that as soon as practicable, but in no event later than 15 business days, after the closing of a business combination, the Company will use its best efforts to file with the SEC a registration statement for the registration, under the Securities Act, of the Class A ordinary shares issuable upon exercise of the warrants. The Company will use its best efforts to cause the same to become effective and to maintain the effectiveness of such registration statement, and a current prospectus relating thereto, until the expiration of the warrants in accordance with the provisions of the warrant agreement. If a registration statement covering the Class A ordinary shares issuable upon exercise of the warrants is not effective by the sixtieth (60th) day after the closing of the initial business combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company will have failed to maintain an effective registration statement, exercise warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption.
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock, authorized	200,000,000	200,000,000	200,000,000
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock voting rights	One vote for each share on each matter on which they are entitled to vote.	One vote for each share on each matter on which they are entitled to vote.
Shares, issued	34,500,000	34,500,000	34,500,000
Shares, outstanding	34,500,000	34,500,000	34,500,000
Shares subject to possible redemption, issued	33,784,066	33,427,182	32,900,501
Shares subject to possible redemption, outstanding	33,784,066	33,427,182	32,900,501
Common stock, shares issued	715,934	1,072,818	1,599,499
Class A Common Stock [Member] | Public Warrants [Member]
Class of Stock [Line Items]
Warrants period of notice prior to redemption	30 days	30 days
Share price to be attained for redemption	$ 10	$ 10
Class F Common Stock [Member]
Class of Stock [Line Items]
Common stock, authorized	20,000,000	20,000,000	20,000,000
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock voting rights	One vote for each share on each matter on which they are entitled to vote.	One vote for each share on each matter on which they are entitled to vote.
Common stock, shares issued	8,625,000	8,625,000	8,625,000
Common shareholder percentage to elect board of directors	66.70%	66.70%
Common stock conversion basis ratio	100.00%	100.00%
Ordinary share conversion percentage of share holder agreement required	66.67%	66.67%
Percentage value of outstanding shares for conversion	20.00%	20.00%
Class F Common Stock [Member] | Sponsors [Member]
Class of Stock [Line Items]
Common stock conversion basis ratio	100.00%	100.00%
Ratio of shares to be received as adjustment to existing shares	11.11%	11.11%

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value Measurements Measured on Recurring Basis (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash and marketable securities held in Trust Account	$ 354,264,460	$ 350,437,823	$ 345,000,000
Quoted Prices in Active Markets (Level 1) [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash and marketable securities held in Trust Account	$ 354,264,460	$ 350,437,823

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Cash and marketable securities held in Trust Account	$ 354,264,460	$ 350,437,823	$ 345,000,000

Merger Agreement - Additional I

Merger Agreement - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019USD ($)Director$ / sharesshares	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017$ / shares	Sep. 26, 2017shares
Business Acquisition [Line Items]
Minimum net tangible assets to complete business combination | $	$ 5,000,001	$ 5,000,001
Vivint Smart Home [Member]
Business Acquisition [Line Items]
Number of shares, Contingently issuable | shares	25,000,000
Shares subject to possible redemption | shares				10,350,000
Class A Common Stock [Member]
Business Acquisition [Line Items]
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Class A Common Stock [Member] | Vivint Smart Home [Member]
Business Acquisition [Line Items]
Business combination, Number of share issued | shares	209.6849221312
Common stock, par value	$ 0.0001
Vivint Common Stock [Member]
Business Acquisition [Line Items]
Common stock, par value	$ 0.01
Fortress Investment Group LLC [Member]
Business Acquisition [Line Items]
Common stock subscription | shares	12,500,000
Blackstone Group Inc. [Member]
Business Acquisition [Line Items]
Common stock subscription | shares	10,000,000
Merger Agreement [Member]
Business Acquisition [Line Items]
Termination fee | $	$ 81,060,000
Sponsor agreement [Member]
Business Acquisition [Line Items]
Threshold share price	$ 15
Sponsor agreement [Member] | Tranche One [Member]
Business Acquisition [Line Items]
Threshold share price	$ 12.50
Founder shares unvested percentage	50.00%
Private placement warrants unvested percentage	50.00%
Sponsor agreement [Member] | Tranche Two [Member]
Business Acquisition [Line Items]
Threshold share price	$ 12.50
Founder shares unvested percentage	25.00%
Private placement warrants unvested percentage	50.00%
Sponsor agreement [Member] | Tranche Three [Member]
Business Acquisition [Line Items]
Threshold share price	$ 15
Founder shares unvested percentage	25.00%
Sponsor agreement [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Threshold share price	$ 12
Number of trading period for transfer of shares	20 days
Number of consecutive trading period for transfer of shares	30 days
Period from completion of business combination	150 days
Support Agreement [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	92.00%
Support Agreement [Member] | Three One Three Acquisition LLC [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	35.00%
Support and Services Agreement [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	5.00%
Monitoring fee	1.00%
Equity Interest Fair value | $	$ 25,000,000
Stockholders agreement [Member]
Business Acquisition [Line Items]
Percentage of nominee directors entitled for nomination	40.00%
Stockholders agreement [Member] | Blackstone [Member] | Condition Four [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	20.00%
Percentage of nominee directors entitled for nomination	20.00%
Stockholders agreement [Member] | Blackstone [Member] | Condition Two [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	50.00%
Stockholders agreement [Member] | Blackstone [Member] | Condition Three [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	30.00%
Stockholders agreement [Member] | Blackstone [Member] | Condition Five [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	5.00%
Percentage of nominee directors entitled for nomination	10.00%
Stockholders agreement [Member] | Fortress Investment Group LLC [Member]
Business Acquisition [Line Items]
Number of nominee directors | Director	1
Stockholders agreement [Member] | Summit Designator [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	50.00%
Number of nominee directors | Director	1
Stockholders agreement [Member] | Minimum [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	30.00%
Stockholders agreement [Member] | Minimum [Member] | Blackstone [Member] | Condition One [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	50.00%
Stockholders agreement [Member] | Minimum [Member] | Blackstone [Member] | Condition Two [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	40.00%
Stockholders agreement [Member] | Minimum [Member] | Fortress Investment Group LLC [Member]
Business Acquisition [Line Items]
Equity Interest Ownership Percentage	50.00%