CONDENSED BALANCE SHEETS - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash	$ 226,141	$ 410,261
Prepaid insurance	20,000	44,884
Total current assets	246,141	455,145
Cash and investments held in Trust Account	63,913,876	72,833,815
Total assets	64,160,017	73,288,960
Current liabilities:
Accounts payable and accrued expenses	2,345,862	257,575
Convertible promissory note to affiliate	2,607,053	1,263,263
Due to affiliate	1,464,876	248,536
Total current liabilities	6,417,791	1,769,374
Deferred underwriters' fees	1,897,500	1,897,500
Total liabilities	8,315,291	3,666,874
Common stock subject to possible redemption: 4,792,150 shares (at redemption value) at September 30, 2015 (6,125,315 shares at December 31, 2014)	50,844,725	64,622,085
Stockholders' equity
Common stock, $.0001 par value, 100,000,000 shares authorized; 3,956,503 and 3,499,410 shares issued and outstanding (excluding 4,792,150 and 6,125,315 shares subject to possible redemption) at September 30, 2015 and December 31, 2014, respectively	396	350
Additional paid-in capital	11,742,179	7,207,424
Accumulated deficit	(6,742,574)	(2,207,773)
Total stockholders’ equity	5,000,001	5,000,001
Total liabilities and stockholders’ equity	$ 64,160,017	$ 73,288,960

Amount of deferred underwriting fees as of balance sheet date.

No definition available.

Name:	gdef_DeferredUnderwritingFees
Namespace Prefix:	gdef_
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.