Note 2 - Significant Accounting Policies (Details) - Concentration of Credit Risk (Customer Concentration Risk [Member])	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Alcatel [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer			4.00%	7.10%
Alcatel [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer			15.00%	8.30%
Centric [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	8.60%	1.90%	7.10%	2.90%
Centric [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	8.20%	3.60%	8.20%	3.60%
Elosoft [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	7.50%	2.40%	6.90%	4.30%
Elosoft [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	10.20%	4.50%	10.20%	4.50%
Ericsson [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	8.50%	7.70%	6.80%	10.20%
Ericsson [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	16.40%	36.70%	16.40%	36.70%
GE [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	12.10%	8.20%	12.50%	5.30%
GE [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	23.10%	14.40%	23.10%	14.40%
IDS LLC [Member] | Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer			5.60%	5.00%
IDS LLC [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer			0.00%	0.00%
Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Customer	41.70%	38.30%	42.90%	42.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer	66.50%	64.30%	72.90%	54.30%