The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mkrgsKuFE

Height: 182
Hash: 69f5b1cda50170f75f9058f652623dd611b917eb71fce751b9271282a6ddc8cf
Previous block: 220e0365e5f4a12645bad0e44d2c0e6cbe179f445e9c40720c45504582a58ee1
Next block: 452d82d842cb948831c808894452af2f8a82ca0d67ae74c96b09492a303cb739
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074764
Stripped size: 228
Size: 228
Nonce: 5
Merkle root: 9fe9d628eed99c5bd3f2e188b65c66cbb5611f28f7f66660c79f7e98d8e51195
Median time: 1544074763
Difficulty: 4.656542373906925e-10
Confirmations: 20
Chainwork: 000000000000000000000000000000000000000000000000000000000000016e
Bits: 207fffff