A reconciliation of the changes in the maintenance and warranty liabilities for the periods ended March 31, 2016 and 2015 are as follows:

 

		2016
		Maintenance			Warranty			Total
Balance at December 31, 2015		$	-		$	-		$	-
Additions for estimated future expense			911			255			1,166
Incurred costs			-			-			-
Other			-			-			-
Balance at March 31, 2016		$	911		$	255		$	1,166
Current portion			911			216			1,127
Long-term portion			-			39			39
Total		$	911		$	255		$	1,166

 

		2015
		Maintenance			Warranty			Total
Balance at December 31, 2014		$	-		$	126		$	126
Additions for estimated future expense			-			-			-
Incurred costs			-			(17)			(17)
Other			-			-			-
Balance at March 31, 2015		$	-		$	109		$	109
Current portion			-			109			109
Long-term portion			-			-			-
Total		$	-		$	109		$	109