Revenue (Tables)

9 Months Ended

Sep. 29, 2018

Disaggregation of Revenue from Contracts with Customers

The following tables represent a disaggregation of revenue from contracts with customers for the three and nine months ended September 29, 2018 and September 30, 2017 along with the reportable segment for each category. As noted above, the prior period amounts have not been adjusted under the modified retrospective method.

Major Products and Service Lines

TFE	Three Months Ended September 29, 2018								Three Months Ended September 30, 2017
	(In thousands)
	HDD		DCP		PV		Total		HDD		DCP		PV		Total
Systems, upgrades and spare parts	$	9,476	$	—	$	51	$	9,527	$	15,620	$	—	$	275	$	15,895
Field service		2,581		—		—		2,581		1,282		—		—		1,282
Total TFE net revenues	$	12,057	$	—	$	51	$	12,108	$	16,902	$	—	$	275	$	17,177
	Nine Months Ended September 29, 2018								Nine Months Ended September 30, 2017
	(In thousands)
	HDD		DCP		PV		Total		HDD		DCP		PV		Total
Systems, upgrades and spare parts	$	39,090	$	1	$	54	$	39,145	$	34,875	$	13,138	$	9,271	$	57,284
Field service		6,561		—		39		6,600		3,803		—		—		3,803
Total TFE net revenues	$	45,651	$	1	$	93	$	45,745	$	38,678	$	13,138	$	9,271	$	61,087

	Three Months Ended				Nine Months Ended
Photonics	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(In thousands)
Products:
Military products	$	4,202	$	6,989	$	8,601	$	20,908
Commercial products		84		38		138		100
Repair and other services		746		333		1,463		727
Total Photonics product net revenues		5,032		7,360		10,202		21,735
Technology development:
CPFF		1,819		1,446		5,829		2,516
FFP		494		728		1,726		2,724
Time and materials		13		15		36		15
Total technology development net revenues		2,326		2,189		7,591		5,255
Total Photonics net revenues	$	7,358	$	9,549	$	17,793	$	26,990

Primary Geographical Markets

	Three Months Ended						Three Months Ended
	September 29, 2018						September 30, 2017
	(In thousands)
	TFE		Photonics		Total		TFE		Photonics		Total
United States	$	287	$	6,868	$	7,155	$	1,370	$	8,924	$	10,294
Asia		11,821		—		11,821		15,807		—		15,807
Europe		—		457		457		—		94		94
Rest of World		—		33		33		—		531		531
Total net revenues	$	12,108	$	7,358	$	19,466	$	17,177	$	9,549	$	26,726
	Nine Months Ended						Nine Months Ended
	September 29, 2018						September 30, 2017
	(In thousands)
	TFE		Photonics		Total		TFE		Photonics		Total
United States	$	3,549	$	16,628	$	20,177	$	4,033	$	25,846	$	29,879
Asia		42,196		31		42,227		57,054		8		57,062
Europe		—		937		937		—		605		605
Rest of World		—		197		197		—		531		531
Total net revenues	$	45,745	$	17,793	$	63,538	$	61,087	$	26,990	$	88,077

Timing of Revenue Recognition

	Three Months Ended						Nine Months Ended
	September 29, 2018						September 29, 2018
	(In thousands)
	TFE		Photonics		Total		TFE		Photonics		Total
Products transferred at a point in time	$	12,108	$	746	$	12,854	$	45,745	$	1,463	$	47,208
Products and services transferred over time		—		6,612		6,612		—		16,330		16,330
	$	12,108	$	7,358	$	19,466	$	45,745	$	17,793	$	63,538

Changes in Contract Assets and Contract Liabilities

The following table reflects the changes in our contract assets, which we classify as accounts receivable, unbilled or retainage, and our contract liabilities, which we classify as deferred revenue and customer advances, for the nine months ended September 29, 2018:

	September 29, 2018		December 30, 2017		Nine Months Change
	(In thousands)
TFE:
Contract assets:
Accounts receivable, unbilled	$	517	$	1,368	$	(851	)
Contract liabilities:
Deferred revenue	$	6,200	$	5,190	$	1,010
Customer advances		11,066		10,204		862
	$	17,266	$	15,394	$	1,872
Photonics:
Contract assets:
Accounts receivable, unbilled	$	1,476	$	1,346	$	130
Retainage		145		281		(136	)
	$	1,621	$	1,627	$	(6	)
Contract liabilities:
Deferred revenue	$	1,317	$	97	$	1,220
Customer advances		550		822		(272	)
	$	1,867	$	919	$	948