Note 14 - Segment Information - Results of the Segments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Dec. 30, 2017
Revenues	$ 51,710,000	$ 45,512,000	$ 102,522,000	$ 91,853,000
Cost of services	38,975,000	33,399,000	77,232,000	67,988,000
Gross profit	12,735,000	12,113,000	25,290,000	23,865,000
Selling, general and administrative	10,076,000	10,075,000	20,497,000	20,392,000
Depreciation and amortization	398,000	410,000	812,000	807,000
Severance, professional fees and other charges	1,371,000		1,371,000
Operating income (loss)	890,000	847,000	2,610,000	1,885,000
Total assets	73,813,000	65,626,000	73,813,000	65,626,000	$ 73,279,000
Capital expenditures	309,000	460,000	598,000	552,000
Change in contingent consideration		781,000		781,000
Engineering [Member]
Revenues	21,571,000	20,586,000	42,988,000	39,810,000
Cost of services	15,934,000	14,889,000	31,658,000	29,076,000
Gross profit	5,637,000	5,697,000	11,330,000	10,734,000
Selling, general and administrative	4,104,000	4,184,000	8,225,000	8,219,000
Depreciation and amortization	265,000	282,000	548,000	566,000
Severance, professional fees and other charges
Operating income (loss)	1,268,000	1,231,000	2,557,000	1,949,000
Total assets	35,602,000	34,050,000	35,602,000	34,050,000
Capital expenditures	282,000	40,000	391,000	109,000
Change in contingent consideration
Specialty Health Care [Member]
Revenues	22,858,000	16,369,000	45,492,000	34,876,000
Cost of services	17,771,000	12,310,000	35,156,000	26,255,000
Gross profit	5,087,000	4,059,000	10,336,000	8,621,000
Selling, general and administrative	4,137,000	3,747,000	8,608,000	7,676,000
Depreciation and amortization	106,000	88,000	211,000	160,000
Severance, professional fees and other charges
Operating income (loss)	844,000	224,000	1,517,000	785,000
Total assets	26,069,000	16,742,000	26,069,000	16,742,000
Capital expenditures	16,000	415,000	56,000	415,000
Change in contingent consideration
Information Technology [Member]
Revenues	7,281,000	8,557,000	14,042,000	17,167,000
Cost of services	5,270,000	6,200,000	10,418,000	12,657,000
Gross profit	2,011,000	2,357,000	3,624,000	4,510,000
Selling, general and administrative	1,835,000	2,144,000	3,664,000	4,497,000
Depreciation and amortization	27,000	40,000	53,000	81,000
Severance, professional fees and other charges
Operating income (loss)	149,000	173,000	(93,000)	(68,000)
Total assets	6,497,000	11,260,000	6,497,000	11,260,000
Capital expenditures	9,000		18,000
Change in contingent consideration
Corporate Segment [Member]
Revenues
Cost of services
Gross profit
Selling, general and administrative
Depreciation and amortization
Severance, professional fees and other charges	1,371,000		1,371,000
Operating income (loss)	(1,371,000)	(781,000)	(1,371,000)	(781,000)
Total assets	5,645,000	3,574,000	5,645,000	3,574,000
Capital expenditures	$ 2,000	5,000	$ 133,000	28,000
Change in contingent consideration		$ 781,000		$ 781,000