Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Disaggregation of Revenue

We have one reportable segment. We treat sales to U.S. customers as sales within the U.S. regardless of where the services are performed. Substantially all of our revenues are from U.S. customers as revenue derived from international customers is de minimus. The following tables disclose revenue (in thousands) by customer type and contract type for the periods presented.  Prior period amounts have not been adjusted under the modified retrospective method.

	2018		2017		2016
Firm fixed-price	$	103,454	$	89,516	$	102,514
Time-and-materials		16,795		10,222		10,181
Cost plus fixed fee		17,767		7,989		22,173
Total	$	138,016	$	107,727	$	134,868

Contract Assets and Liabilities

The following table discloses contract receivables (in thousands):

	December 31, 2018			January 1, 2018			December 31, 2017
Billed accounts receivable	$	18,848		$	11,736		$	11,736
Unbilled receivables		16,000			13,195			13,195
Allowance for doubtful accounts		(306	)		(411	)		(411	)
Receivables – net	$	34,542		$	24,520		$	24,520

The following table discloses contract liabilities (in thousands):

	December 31, 2018		January 1, 2018		December 31, 2017
Contract liabilities	$	5,232	$	10,073	$	10,073

Allowance for Obsolescent Inventory

The components of the allowance for inventory obsolescence are set forth below (in thousands):

	Balance Beginning of Year		Additions Charge to Costs and Expense		Recoveries			Balance End of Year
Year Ended December 31, 2018	$	1,484	$	30	$	(994	)	$	520
Year Ended December 31, 2017	$	1,672	$	73	$	(261	)	$	1,484
Year Ended December 31, 2016	$	1,457	$	215	$	--		$	1,672

Property and Equipment Useful Lives

Property and equipment is recorded at cost. Depreciation is provided on the straight-line method at rates based on the estimated useful lives of the individual assets or classes of assets as follows:

Furniture and equipment	3-5   Years
Leasehold improvements	Lesser of life of lease or useful life of asset
Property and equipment under capital leases	Lesser of life of lease or useful life of asset