Note 2 - Accounts Receivable	12 Months Ended
Dec. 31, 2011
Trade And Other Accounts Receivable Disclosure [Text Block]	2. ACCOUNTS RECEIVABLE Accounts receivable are stated net of an allowance for doubtful accounts of $0.40 million and $0.42 million at December 31, 2011 and 2010, respectively. Accounts receivable are principally due from customers in, and dealers serving, the broadcast video industry. At December 31, 2011 and 2010, receivables included approximately $1.4 million and $1.0 million, respectively, due from foreign customers. Bad debt expense amounted to zero in 2011 and 2010. We record an allowance for doubtful accounts based on specifically identified amounts that management believes to be uncollectible and an additional allowance based on historical experience and management’s assessment of the general financial conditions affecting our customer base. We also evaluate the credit worthiness of our customers and determine whether collateral (in the form of letters of credit or credit insurance) should be taken or whether reduced credit limits are necessary. Credit losses have consistently been within management’s expectations. The carrying amounts of accounts receivable approximate their fair values.

Note 2 - Accounts Receivable

12 Months Ended

Dec. 31, 2011

Trade And Other Accounts Receivable Disclosure [Text Block]

2. ACCOUNTS RECEIVABLE

Accounts receivable are stated net of an allowance for doubtful accounts of $0.40 million and $0.42 million at December 31, 2011 and 2010, respectively. Accounts receivable are principally due from customers in, and dealers serving, the broadcast video industry. At December 31, 2011 and 2010, receivables included approximately $1.4 million and $1.0 million, respectively, due from foreign customers.

Bad debt expense amounted to zero in 2011 and 2010. We record an allowance for doubtful accounts based on specifically identified amounts that management believes to be uncollectible and an additional allowance based on historical experience and management’s assessment of the general financial conditions affecting our customer base. We also evaluate the credit worthiness of our customers and determine whether collateral (in the form of letters of credit or credit insurance) should be taken or whether reduced credit limits are necessary. Credit losses have consistently been within management’s expectations. The carrying amounts of accounts receivable approximate their fair values.