Note 9 - Subsequent Events	3 Months Ended
Mar. 31, 2012
Subsequent Events [Text Block]	9. Subsequent Events On March 19, 2012, the Company declared dividends for the first quarter 2012. On April 5, 2012, the Company paid dividends of $0.22 per share of common stock to all common stockholders of record as of March 30, 2012. A portion of the total dividend in the amount of $0.13 per share represented payment of the regular quarterly dividend and the remaining $0.09 per share represented an additional special dividend payment. On the same date, the operating partnerships paid a distribution of $0.22 per O.P. unit to all O.P. unit holders. Aggregate dividends and distributions amounted to approximately $23,163. On April 30, 2012, the Company completed the sale of four R&D buildings consisting of approximately 145,000 rentable square feet located at 1490-1520 McCandless Drive, 1525-1555 McCandless Drive, 1575-1595 McCandless Drive and 1600 McCandless Drive in Milpitas, California. On the total cash sales price of $19,350, the Company will recognize a gain of approximately $8,697 and classify it as a gain from disposal of discontinued operations.

Note 9 - Subsequent Events

3 Months Ended

Mar. 31, 2012

9. Subsequent Events

On March 19, 2012, the Company declared dividends for the first quarter 2012. On April 5, 2012, the Company paid dividends of $0.22 per share of common stock to all common stockholders of record as of March 30, 2012. A portion of the total dividend in the amount of $0.13 per share represented payment of the regular quarterly dividend and the remaining $0.09 per share represented an additional special dividend payment. On the same date, the operating partnerships paid a distribution of $0.22 per O.P. unit to all O.P. unit holders. Aggregate dividends and distributions amounted to approximately $23,163.

On April 30, 2012, the Company completed the sale of four R&D buildings consisting of approximately 145,000 rentable square feet located at 1490-1520 McCandless Drive, 1525-1555 McCandless Drive, 1575-1595 McCandless Drive and 1600 McCandless Drive in Milpitas, California. On the total cash sales price of $19,350, the Company will recognize a gain of approximately $8,697 and classify it as a gain from disposal of discontinued operations.