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SEGMENT REPORTING (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) segment | Jun. 30, 2015 USD ($) segment | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Segment reporting |  |  |  |  |
Number of reportable segments | segment |  | 4 | 5 |  |
Revenue |  |  |  |  |
Revenue | $ 90,326 | $ 83,269 | $ 175,670 | $ 158,443 |
Depreciation and amortization | 14,472 | 12,930 | 29,223 | 24,910 |
Non-cash stock-based compensation | 1,453 | 1,323 | 2,677 | 2,379 |
Operating income (loss) | 28,732 | 21,607 | 47,892 | 37,855 |
Segment Assets |  |  |  |  |
Net fixed assets | 362,432 |  | 362,432 |  | $ 369,582
Goodwill | 45,077 |  | 45,077 |  | 45,077
Total assets | 937,155 |  | 937,155 |  | 925,030
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 28,031 | 25,104 |
U.S. Wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 40,103 | 37,456 | 75,946 | 65,848 |
International wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 20,223 | 22,422 | 41,395 | 45,570 |
Wireline |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 22,089 | 21,283 | 42,681 | 42,813 |
Equipment and other |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 2,621 | 2,108 | 5,069 | 4,212 |
Renewable energy |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 5,290 |  | 10,579 |  |
Reconciling Items |  |  |  |  |
Revenue |  |  |  |  |
Depreciation and amortization | 1,212 | 1,284 | 2,346 | 1,899 |
Non-cash stock-based compensation | 1,424 | 1,323 | 2,467 | 2,379 |
Operating income (loss) | (7,413) | (7,224) | (13,867) | (12,552) |
Segment Assets |  |  |  |  |
Net fixed assets | 13,988 |  | 13,988 |  | 14,655
Total assets | 303,396 |  | 303,396 |  | 287,871
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 1,679 | 1,253 |
Reconciling Items | Discontinued operations |  |  |  |  |
Segment Assets |  |  |  |  |
Total assets | 70 |  | 70 |  | 175
U.S. Wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 40,897 | 37,815 | 77,377 | 66,538 |
Depreciation and amortization | 4,507 | 3,453 | 8,653 | 6,756 |
Operating income (loss) | 24,043 | 22,651 | 41,952 | 36,240 |
Segment Assets |  |  |  |  |
Net fixed assets | 83,456 |  | 83,456 |  | 79,910
Goodwill | 32,148 |  | 32,148 |  | 32,148
Total assets | 194,477 |  | 194,477 |  | 188,377
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 14,125 | 14,845 |
U.S. Wireless | U.S. Wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 40,103 | 37,456 | 75,946 | 65,848 |
U.S. Wireless | Wireline |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 152 | 152 | 305 | 305 |
U.S. Wireless | Equipment and other |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 642 | 207 | 1,126 | 385 |
International Integrated Telephony |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 22,357 | 21,397 | 43,463 | 43,195 |
Depreciation and amortization | 4,413 | 4,400 | 8,780 | 8,713 |
Operating income (loss) | 6,466 | 4,594 | 10,232 | 10,229 |
Segment Assets |  |  |  |  |
Net fixed assets | 104,828 |  | 104,828 |  | 108,972
Total assets | 200,602 |  | 200,602 |  | 201,649
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 4,748 | 6,072 |
International Integrated Telephony | International wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 6,485 | 6,758 | 12,611 | 13,655 |
International Integrated Telephony | Wireline |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 15,410 | 14,445 | 30,009 | 29,151 |
International Integrated Telephony | Equipment and other |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 462 | 194 | 843 | 389 |
Island Wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 15,199 | 17,305 | 31,771 | 35,228 |
Depreciation and amortization | 1,986 | 2,607 | 4,530 | 5,215 |
Operating income (loss) | 3,866 | 2,552 | 6,288 | 5,978 |
Segment Assets |  |  |  |  |
Net fixed assets | 23,050 |  | 23,050 |  | 26,590
Goodwill | 5,438 |  | 5,438 |  | 5,438
Total assets | 73,703 |  | 73,703 |  | 74,563
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 4,517 | 1,958 |
Island Wireless | International wireless |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 13,738 | 15,664 | 28,784 | 31,915 |
Island Wireless | Equipment and other |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 1,461 | 1,641 | 2,987 | 3,313 |
U.S. Wireline |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 6,583 | 6,752 | 12,480 | 13,482 |
Depreciation and amortization | 1,150 | 1,186 | 2,506 | 2,327 |
Operating income (loss) | (921) | (966) | (2,056) | (2,040) |
Segment Assets |  |  |  |  |
Net fixed assets | 28,165 |  | 28,165 |  | 28,113
Goodwill | 7,491 |  | 7,491 |  | 7,491
Total assets | 42,895 |  | 42,895 |  | 42,446
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 2,950 | 976 |
U.S. Wireline | Wireline |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 6,527 | 6,686 | 12,367 | 13,357 |
U.S. Wireline | Equipment and other |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 56 | $ 66 | 113 | $ 125 |
Renewable energy |  |  |  |  |
Revenue |  |  |  |  |
Revenue | 5,290 |  | 10,579 |  |
Depreciation and amortization | 1,204 |  | 2,408 |  |
Non-cash stock-based compensation | 29 |  | 210 |  |
Operating income (loss) | 2,691 |  | 5,343 |  |
Segment Assets |  |  |  |  |
Net fixed assets | 108,945 |  | 108,945 |  | 111,342
Total assets | 122,080 |  | 122,080 |  | $ 130,124
Capital Expenditures |  |  |  |  |
Capital expenditures |  |  | 12 |  |
Renewable energy | Renewable energy |  |  |  |  |
Revenue |  |  |  |  |
Revenue | $ 5,290 |  | $ 10,579 |  |

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