OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Changes in allowance for doubtful accounts

Changes in allowance for doubtful accounts are summarized as follows (in thousands):

	Years Ended December 31,
	2016			2015		2014
Balances at beginning of period	$	189		$	216	$	209
Additions - charged to expense	163			83		143
Deductions - write offs, net of recoveries	(115		)	(110)		(136)
Balances at end of period	$	237		$	189	$	216

Schedule of inventory

Inventories, net consist of the following (in thousands):

	December 31,
	2016			2015
Raw materials	$	10,807		$	8,531
Work in process	3,820			2,839
Finished goods	7,087			6,122
Allowance for excess or obsolete inventory	(1,319		)	(1,391		)
	$	20,395		$	16,101

Schedule of property and equipment

We provide for depreciation primarily using the straight-line method by charges to income in amounts that allocate the cost of property and equipment over their estimated useful lives as follows:

Asset Classification	Estimated Useful Life
Building	10 to 20 years
Machinery and equipment	3 to 15 years
Leasehold and building improvements	7 to 15 years

Detail of property and equipment is as follows (in thousands):

	December 31,
	2016			2015
Land	$	377		$	377
Building	2,868			2,868
Machinery and equipment	36,588			35,284
Leasehold and building improvements	7,662			6,673
Construction in progress	1,655			1,496
	49,150			46,698
Less accumulated depreciation	(32,569		)	(29,678		)
Total property and equipment, net	$	16,581		$	17,020