ACQUISITIONS (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Net loss	$ (2,071)	$ (38)	$ (4,916)	$ (165)
Less: Net loss attributable to non-controlling interest	$ 104		$ 216
Basic and diluted weighted average common shares outstanding (in shares)	13,745,540	6,775,971	10,884,948	6,775,971
Microphase Corporation [Member]
Business Acquisition [Line Items]
Revenue	$ 3,583	$ 3,751	$ 10,329	$ 12,692
Net loss	(2,277)	(711)	(4,820)	(1,742)
Less: Net loss attributable to non-controlling interest	103	290	103	714
Net loss attributable to Digital Power Corp	(2,144)	(421)	(4,717)	(1,028)
Preferred deemed dividends			(319)
Preferred dividends	(27)		(35)
Loss available to common shareholders	$ (2,171)	$ (421)	$ (5,071)	$ (1,028)
Basic and diluted net loss per common share (in dollars per share)	$ (0.14)	$ (0.05)	$ (0.40)	$ (0.12)
Basic and diluted weighted average common shares outstanding (in shares)	15,587,988	8,618,419	12,727,396	8,618,419
Comprehensive Loss
Loss available to common shareholders	$ (2,171)	$ (421)	$ (5,071)	$ (1,028)
Other comprehensive income (loss)
Change in net foreign currency translation adjustments	42	(55)	141	(265)
Net unrealized gain (loss) on securities available-for-sale, net of income taxes	(43)	186	(43)	204
Other comprehensive income (loss)	(1)	131	98	(61)
Total Comprehensive loss	$ (2,172)	$ (290)	$ (4,973)	$ (1,089)