A reconciliation of the changes in the maintenance and warranty liabilities for the period ended June 30, 2016 is as follows:

 

		2016
		Maintenance			Warranty			Total
Balance at December 31, 2015		$	-		$	-		$	-
Additions for estimated future expense			911			255			1,166
Incurred costs			(175)			(17)			(192)
Balance at June 30, 2016		$	736		$	238		$	974
Current portion			736			217			953
Long-term portion			-			21			21
Total		$	736		$	238		$	974