CONDENSED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current Assets
Cash	$ 885,872	$ 1,275,571
Prepaid expenses and other current assets	251,711	23,116
Total Current Assets	1,137,583	1,298,687
Marketable securities held in Trust Account	201,556,711	200,471,972
Security deposit	7,125	7,125
Total Assets	202,701,419	201,777,784
Current Liabilities
Accounts payable and accrued expenses	138,668	86,278
Income taxes payable	260,774	77,877
Total Current Liabilities	399,442	164,155
Deferred underwriting fees	7,000,000	7,000,000
Total Liabilities	7,399,442	7,164,155
Commitments
Common stock subject to possible redemption, 18,912,379 and 18,926,577 shares at redemption value as of March 31, 2019 and December 31, 2018, respectively	190,301,976	189,613,628
Stockholders' Equity
Preferred stock; $0.0001 par value; 1,000,000 shares authorized; none issued and outstanding
Additional paid in capital	4,023,534	4,711,809
Retained earnings	975,833	287,485
Total Stockholders' Equity	5,000,001	5,000,001
Total Liabilities and Stockholders' Equity	202,701,419	201,777,784
Class A Common Stock [Member]
Stockholders' Equity
Common stock	134	132
Common Class F [Member]
Stockholders' Equity
Common stock	$ 500	$ 575

The amount represents information about deferred underwriting fee charged to additional paid in capital.

No definition available.

Name:	bmwc_DeferredUnderwritingFeePayable
Namespace Prefix:	bmwc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.