Note 2 - Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Note 2 - Significant Accounting Policies (Tables) [Line Items]

Allowance for Credit Losses on Financing Receivables [Table Text Block]

	Beginning Balance		Charge Offs		Recoveries		Provision			Ending Balance
2014	$	23,100	$	—	$	—	$	(2,700	)	$	20,400
2013		15,600		—		—		9,000			24,600

	Beginning Balance		Charge Offs		Recoveries		Provision			Ending Balance
2014	$	42,000	$	—	$	—	$	(21,600	)	$	20,400
2013		33,900		—		—		(9,300	)		24,600

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	Three Months Ended June 30, 2014			As of June 30, 2014			Three Months Ended June 30, 2013			As of June 30, 2013
Customer	Sales			Accounts Receivable			Sales			Accounts Receivable
Centric		8.6	%		8.2	%		1.9	%		3.6	%
Elosoft		7.5	%		10.2	%		2.4	%		4.5	%
Ericsson		8.5	%		16.4	%		7.7	%		36.7	%
GAD		0.0	%		0.0	%		7.3	%		0.0	%
GE		12.1	%		23.1	%		8.2	%		14.4	%
Intellisis		0.0	%		0.0	%		6.5	%		0.0	%
Thermo LabSystems		5.0	%		8.6	%		4.3	%		5.1	%
Total		41.7	%		66.5	%		38.3	%		64.3	%

Six Months Ended [Member]

Note 2 - Significant Accounting Policies (Tables) [Line Items]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	Six Months Ended June 30, 2014			As of June 30, 2014			Six Months Ended June 30, 2013			As of June 30, 2013
Customer	Sales			Accounts Receivable			Sales			Accounts Receivable
Alcatel-Lucent		4.0	%		15.0	%		7.1	%		8.3	%
Centric		7.1	%		8.2	%		2.9	%		3.6	%
Elosoft		6.9	%		10.2	%		4.3	%		4.5	%
Ericsson		6.8	%		16.4	%		10.2	%		36.7	%
GE		12.5	%		23.1	%		5.3	%		14.4	%
IDS		5.6	%		0.0	%		5.0	%		0.0	%
Total		42.9	%		72.9	%		42.0	%		54.3	%